---
_id: '10654'
abstract:
- lang: eng
text: "Directed percolation (DP) has recently emerged as a possible solution to
the century old puzzle surrounding the transition to turbulence. Multiple model
studies reported DP exponents, however, experimental evidence is limited since
the largest possible observation times are orders of magnitude shorter than the
flows’ characteristic timescales. An exception is cylindrical Couette flow where
the limit is not temporal, but rather the realizable system size. We present experiments
in a Couette setup of unprecedented azimuthal and axial aspect ratios. Approaching
the critical point to within less than 0.1% we determine five critical exponents,
all of which are in excellent agreement with the 2+1D DP universality class. The
complex dynamics encountered at \r\nthe onset of turbulence can hence be fully
rationalized within the framework of statistical mechanics."
acknowledged_ssus:
- _id: M-Shop
acknowledgement: "We thank T.Menner, T.Asenov, P. Maier and the Miba machine shop
of IST Austria for their valuable support in all technical aspects. We thank Marc
Avila for comments on the manuscript. This work was supported by a grant from the
Simons Foundation (662960, B.H.). We acknowledge the European Research Council under
the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement
306589 for financial support. K.A.\r\nacknowledges funding from the Central Research
Development Fund of the University of Bremen, grant number ZF04B /2019/FB04 Avila
Kerstin (”Independent Project for Postdocs”). L.K. was supported by the European
Union’s Horizon 2020 Research and innovation programme under the Marie Sklodowska-Curie
grant agreement No. 754411.\r\n"
article_number: '014502'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Lukasz
full_name: Klotz, Lukasz
id: 2C9AF1C2-F248-11E8-B48F-1D18A9856A87
last_name: Klotz
orcid: 0000-0003-1740-7635
- first_name: Grégoire M
full_name: Lemoult, Grégoire M
id: 4787FE80-F248-11E8-B48F-1D18A9856A87
last_name: Lemoult
- first_name: Kerstin
full_name: Avila, Kerstin
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Klotz L, Lemoult GM, Avila K, Hof B. Phase transition to turbulence in spatially
extended shear flows. Physical Review Letters. 2022;128(1). doi:10.1103/PhysRevLett.128.014502
apa: Klotz, L., Lemoult, G. M., Avila, K., & Hof, B. (2022). Phase transition
to turbulence in spatially extended shear flows. Physical Review Letters.
American Physical Society. https://doi.org/10.1103/PhysRevLett.128.014502
chicago: Klotz, Lukasz, Grégoire M Lemoult, Kerstin Avila, and Björn Hof. “Phase
Transition to Turbulence in Spatially Extended Shear Flows.” Physical Review
Letters. American Physical Society, 2022. https://doi.org/10.1103/PhysRevLett.128.014502.
ieee: L. Klotz, G. M. Lemoult, K. Avila, and B. Hof, “Phase transition to turbulence
in spatially extended shear flows,” Physical Review Letters, vol. 128,
no. 1. American Physical Society, 2022.
ista: Klotz L, Lemoult GM, Avila K, Hof B. 2022. Phase transition to turbulence
in spatially extended shear flows. Physical Review Letters. 128(1), 014502.
mla: Klotz, Lukasz, et al. “Phase Transition to Turbulence in Spatially Extended
Shear Flows.” Physical Review Letters, vol. 128, no. 1, 014502, American
Physical Society, 2022, doi:10.1103/PhysRevLett.128.014502.
short: L. Klotz, G.M. Lemoult, K. Avila, B. Hof, Physical Review Letters 128 (2022).
date_created: 2022-01-23T23:01:28Z
date_published: 2022-01-05T00:00:00Z
date_updated: 2023-08-02T13:59:19Z
day: '05'
department:
- _id: BjHo
doi: 10.1103/PhysRevLett.128.014502
ec_funded: 1
external_id:
arxiv:
- '2111.14894'
isi:
- '000748271700010'
pmid:
- '35061458'
intvolume: ' 128'
isi: 1
issue: '1'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2111.14894
month: '01'
oa: 1
oa_version: Preprint
pmid: 1
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 238598C6-32DE-11EA-91FC-C7463DDC885E
grant_number: '662960'
name: 'Revisiting the Turbulence Problem Using Statistical Mechanics: Experimental
Studies on Transitional and Turbulent Flows'
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Phase transition to turbulence in spatially extended shear flows
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 128
year: '2022'
...
---
_id: '7258'
abstract:
- lang: eng
text: Many flows encountered in nature and applications are characterized by a chaotic
motion known as turbulence. Turbulent flows generate intense friction with pipe
walls and are responsible for considerable amounts of energy losses at world scale.
The nature of turbulent friction and techniques aimed at reducing it have been
subject of extensive research over the last century, but no definite answer has
been found yet. In this thesis we show that in pipes at moderate turbulent Reynolds
numbers friction is better described by the power law first introduced by Blasius
and not by the Prandtl–von Kármán formula. At higher Reynolds numbers, large scale
motions gradually become more important in the flow and can be related to the
change in scaling of friction. Next, we present a series of new techniques that
can relaminarize turbulence by suppressing a key mechanism that regenerates it
at walls, the lift–up effect. In addition, we investigate the process of turbulence
decay in several experiments and discuss the drag reduction potential. Finally,
we examine the behavior of friction under pulsating conditions inspired by the
human heart cycle and we show that under such circumstances turbulent friction
can be reduced to produce energy savings.
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Davide
full_name: Scarselli, Davide
id: 40315C30-F248-11E8-B48F-1D18A9856A87
last_name: Scarselli
orcid: 0000-0001-5227-4271
citation:
ama: Scarselli D. New approaches to reduce friction in turbulent pipe flow. 2020.
doi:10.15479/AT:ISTA:7258
apa: Scarselli, D. (2020). New approaches to reduce friction in turbulent pipe
flow. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:7258
chicago: Scarselli, Davide. “New Approaches to Reduce Friction in Turbulent Pipe
Flow.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:7258.
ieee: D. Scarselli, “New approaches to reduce friction in turbulent pipe flow,”
Institute of Science and Technology Austria, 2020.
ista: Scarselli D. 2020. New approaches to reduce friction in turbulent pipe flow.
Institute of Science and Technology Austria.
mla: Scarselli, Davide. New Approaches to Reduce Friction in Turbulent Pipe Flow.
Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:7258.
short: D. Scarselli, New Approaches to Reduce Friction in Turbulent Pipe Flow, Institute
of Science and Technology Austria, 2020.
date_created: 2020-01-12T16:07:26Z
date_published: 2020-01-13T00:00:00Z
date_updated: 2023-09-15T12:20:08Z
day: '13'
ddc:
- '532'
degree_awarded: PhD
department:
- _id: BjHo
doi: 10.15479/AT:ISTA:7258
ec_funded: 1
file:
- access_level: closed
checksum: 4df1ab24e9896635106adde5a54615bf
content_type: application/zip
creator: dscarsel
date_created: 2020-01-12T15:57:14Z
date_updated: 2021-01-13T23:30:05Z
embargo_to: open_access
file_id: '7259'
file_name: 2020_Scarselli_Thesis.zip
file_size: 26640830
relation: source_file
- access_level: open_access
checksum: 48659ab98e3414293c7a721385c2fd1c
content_type: application/pdf
creator: dscarsel
date_created: 2020-01-12T15:56:14Z
date_updated: 2021-01-13T23:30:05Z
embargo: 2021-01-12
file_id: '7260'
file_name: 2020_Scarselli_Thesis.pdf
file_size: 8515844
relation: main_file
file_date_updated: 2021-01-13T23:30:05Z
has_accepted_license: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: None
page: '174'
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 25104D44-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '737549'
name: Eliminating turbulence in oil pipelines
- _id: 25136C54-B435-11E9-9278-68D0E5697425
grant_number: HO 4393/1-2
name: Experimental studies of the turbulence transition and transport processes
in turbulent Taylor-Couette currents
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '6228'
relation: part_of_dissertation
status: public
- id: '6486'
relation: part_of_dissertation
status: public
- id: '461'
relation: part_of_dissertation
status: public
- id: '422'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
title: New approaches to reduce friction in turbulent pipe flow
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2020'
...
---
_id: '6228'
abstract:
- lang: eng
text: Following the recent observation that turbulent pipe flow can be relaminarised bya relatively simple modification of the mean velocity profile, we here carry out aquantitative experimental investigation of this phenomenon. Our study confirms thata flat velocity profile leads to a collapse of turbulence and in order to achieve theblunted profile shape, we employ a moving pipe segment that is briefly and rapidlyshifted in the streamwise direction. The relaminarisation threshold and the minimumshift length and speeds are determined as a function of Reynolds number. Althoughturbulence is still active after the acceleration phase, the modulated profile possessesa severely decreased lift-up potential as measured by transient growth. As shown,this results in an exponential decay of fluctuations and the flow relaminarises. Whilethis method can be easily applied at low to moderate flow speeds, the minimumstreamwise length over which the acceleration needs to act increases linearly with theReynolds number.
article_processing_charge: No
arxiv: 1
author:
- first_name: Davide
full_name: Scarselli, Davide
id: 40315C30-F248-11E8-B48F-1D18A9856A87
last_name: Scarselli
orcid: 0000-0001-5227-4271
- first_name: Jakob
full_name: Kühnen, Jakob
id: 3A47AE32-F248-11E8-B48F-1D18A9856A87
last_name: Kühnen
orcid: 0000-0003-4312-0179
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Scarselli D, Kühnen J, Hof B. Relaminarising pipe flow by wall movement. Journal
of Fluid Mechanics. 2019;867:934-948. doi:10.1017/jfm.2019.191
apa: Scarselli, D., Kühnen, J., & Hof, B. (2019). Relaminarising pipe flow by
wall movement. Journal of Fluid Mechanics. Cambridge University Press.
https://doi.org/10.1017/jfm.2019.191
chicago: Scarselli, Davide, Jakob Kühnen, and Björn Hof. “Relaminarising Pipe Flow
by Wall Movement.” Journal of Fluid Mechanics. Cambridge University Press,
2019. https://doi.org/10.1017/jfm.2019.191.
ieee: D. Scarselli, J. Kühnen, and B. Hof, “Relaminarising pipe flow by wall movement,”
Journal of Fluid Mechanics, vol. 867. Cambridge University Press, pp. 934–948,
2019.
ista: Scarselli D, Kühnen J, Hof B. 2019. Relaminarising pipe flow by wall movement.
Journal of Fluid Mechanics. 867, 934–948.
mla: Scarselli, Davide, et al. “Relaminarising Pipe Flow by Wall Movement.” Journal
of Fluid Mechanics, vol. 867, Cambridge University Press, 2019, pp. 934–48,
doi:10.1017/jfm.2019.191.
short: D. Scarselli, J. Kühnen, B. Hof, Journal of Fluid Mechanics 867 (2019) 934–948.
date_created: 2019-04-07T21:59:14Z
date_published: 2019-05-25T00:00:00Z
date_updated: 2024-03-25T23:30:20Z
day: '25'
department:
- _id: BjHo
doi: 10.1017/jfm.2019.191
ec_funded: 1
external_id:
arxiv:
- '1807.05357'
isi:
- '000462606100001'
intvolume: ' 867'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1807.05357
month: '05'
oa: 1
oa_version: Preprint
page: 934-948
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 25104D44-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '737549'
name: Eliminating turbulence in oil pipelines
publication: Journal of Fluid Mechanics
publication_identifier:
eissn:
- '14697645'
issn:
- '00221120'
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
related_material:
link:
- relation: supplementary_material
url: https://doi.org/10.1017/jfm.2019.191
record:
- id: '7258'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Relaminarising pipe flow by wall movement
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 867
year: '2019'
...
---
_id: '6486'
abstract:
- lang: eng
text: Based on a novel control scheme, where a steady modification of the streamwise
velocity profile leads to complete relaminarization of initially fully turbulent
pipe flow, we investigate the applicability and usefulness of custom-shaped honeycombs
for such control. The custom-shaped honeycombs are used as stationary flow management
devices which generate specific modifications of the streamwise velocity profile.
Stereoscopic particle image velocimetry and pressure drop measurements are used
to investigate and capture the development of the relaminarizing flow downstream
these devices. We compare the performance of straight (constant length across
the radius of the pipe) honeycombs with custom-shaped ones (variable length across
the radius) and try to determine the optimal shape for maximal relaminarization
at minimal pressure loss. The optimally modified streamwise velocity profile is
found to be M-shaped, and the maximum attainable Reynolds number for total relaminarization
is found to be of the order of 10,000. Consequently, the respective reduction
in skin friction downstream of the device is almost by a factor of 5. The break-even
point, where the additional pressure drop caused by the device is balanced by
the savings due to relaminarization and a net gain is obtained, corresponds to
a downstream stretch of distances as low as approximately 100 pipe diameters of
laminar flow.
acknowledged_ssus:
- _id: M-Shop
article_number: '111105'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jakob
full_name: Kühnen, Jakob
id: 3A47AE32-F248-11E8-B48F-1D18A9856A87
last_name: Kühnen
orcid: 0000-0003-4312-0179
- first_name: Davide
full_name: Scarselli, Davide
id: 40315C30-F248-11E8-B48F-1D18A9856A87
last_name: Scarselli
orcid: 0000-0001-5227-4271
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Kühnen J, Scarselli D, Hof B. Relaminarization of pipe flow by means of 3D-printed
shaped honeycombs. Journal of Fluids Engineering. 2019;141(11). doi:10.1115/1.4043494
apa: Kühnen, J., Scarselli, D., & Hof, B. (2019). Relaminarization of pipe flow
by means of 3D-printed shaped honeycombs. Journal of Fluids Engineering.
ASME. https://doi.org/10.1115/1.4043494
chicago: Kühnen, Jakob, Davide Scarselli, and Björn Hof. “Relaminarization of Pipe
Flow by Means of 3D-Printed Shaped Honeycombs.” Journal of Fluids Engineering.
ASME, 2019. https://doi.org/10.1115/1.4043494.
ieee: J. Kühnen, D. Scarselli, and B. Hof, “Relaminarization of pipe flow by means
of 3D-printed shaped honeycombs,” Journal of Fluids Engineering, vol. 141,
no. 11. ASME, 2019.
ista: Kühnen J, Scarselli D, Hof B. 2019. Relaminarization of pipe flow by means
of 3D-printed shaped honeycombs. Journal of Fluids Engineering. 141(11), 111105.
mla: Kühnen, Jakob, et al. “Relaminarization of Pipe Flow by Means of 3D-Printed
Shaped Honeycombs.” Journal of Fluids Engineering, vol. 141, no. 11, 111105,
ASME, 2019, doi:10.1115/1.4043494.
short: J. Kühnen, D. Scarselli, B. Hof, Journal of Fluids Engineering 141 (2019).
date_created: 2019-05-26T21:59:13Z
date_published: 2019-11-01T00:00:00Z
date_updated: 2024-03-25T23:30:20Z
day: '01'
department:
- _id: BjHo
doi: 10.1115/1.4043494
ec_funded: 1
external_id:
arxiv:
- '1809.07625'
isi:
- '000487748600005'
intvolume: ' 141'
isi: 1
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1809.07625
month: '11'
oa: 1
oa_version: Preprint
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Journal of Fluids Engineering
publication_identifier:
eissn:
- 1528901X
issn:
- '00982202'
publication_status: published
publisher: ASME
quality_controlled: '1'
related_material:
record:
- id: '7258'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Relaminarization of pipe flow by means of 3D-printed shaped honeycombs
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 141
year: '2019'
...
---
_id: '328'
abstract:
- lang: eng
text: The drag of turbulent flows can be drastically decreased by adding small amounts
of high molecular weight polymers. While drag reduction initially increases with
polymer concentration, it eventually saturates to what is known as the maximum
drag reduction (MDR) asymptote; this asymptote is generally attributed to the
dynamics being reduced to a marginal yet persistent state of subdued turbulent
motion. Contrary to this accepted view, we show that, for an appropriate choice
of parameters, polymers can reduce the drag beyond the suggested asymptotic limit,
eliminating turbulence and giving way to laminar flow. At higher polymer concentrations,
however, the laminar state becomes unstable, resulting in a fluctuating flow with
the characteristic drag of the MDR asymptote. Our findings indicate that the asymptotic
state is hence dynamically disconnected from ordinary turbulence. © 2018 American
Physical Society.
acknowledged_ssus:
- _id: SSU
acknowledgement: The authors thank Philipp Maier and the IST Austria workshop for
their dedicated technical support.
article_number: '124501'
article_processing_charge: No
author:
- first_name: George H
full_name: Choueiri, George H
id: 448BD5BC-F248-11E8-B48F-1D18A9856A87
last_name: Choueiri
- first_name: Jose M
full_name: Lopez Alonso, Jose M
id: 40770848-F248-11E8-B48F-1D18A9856A87
last_name: Lopez Alonso
orcid: 0000-0002-0384-2022
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Choueiri GH, Lopez Alonso JM, Hof B. Exceeding the asymptotic limit of polymer
drag reduction. Physical Review Letters. 2018;120(12). doi:10.1103/PhysRevLett.120.124501
apa: Choueiri, G. H., Lopez Alonso, J. M., & Hof, B. (2018). Exceeding the asymptotic
limit of polymer drag reduction. Physical Review Letters. American Physical
Society. https://doi.org/10.1103/PhysRevLett.120.124501
chicago: Choueiri, George H, Jose M Lopez Alonso, and Björn Hof. “Exceeding the
Asymptotic Limit of Polymer Drag Reduction.” Physical Review Letters. American
Physical Society, 2018. https://doi.org/10.1103/PhysRevLett.120.124501.
ieee: G. H. Choueiri, J. M. Lopez Alonso, and B. Hof, “Exceeding the asymptotic
limit of polymer drag reduction,” Physical Review Letters, vol. 120, no.
12. American Physical Society, 2018.
ista: Choueiri GH, Lopez Alonso JM, Hof B. 2018. Exceeding the asymptotic limit
of polymer drag reduction. Physical Review Letters. 120(12), 124501.
mla: Choueiri, George H., et al. “Exceeding the Asymptotic Limit of Polymer Drag
Reduction.” Physical Review Letters, vol. 120, no. 12, 124501, American
Physical Society, 2018, doi:10.1103/PhysRevLett.120.124501.
short: G.H. Choueiri, J.M. Lopez Alonso, B. Hof, Physical Review Letters 120 (2018).
date_created: 2018-12-11T11:45:51Z
date_published: 2018-03-19T00:00:00Z
date_updated: 2023-10-10T13:27:44Z
day: '19'
department:
- _id: BjHo
doi: 10.1103/PhysRevLett.120.124501
ec_funded: 1
external_id:
isi:
- '000427804000005'
intvolume: ' 120'
isi: 1
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1703.06271
month: '03'
oa: 1
oa_version: Preprint
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '7537'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Exceeding the asymptotic limit of polymer drag reduction
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 120
year: '2018'
...
---
_id: '461'
abstract:
- lang: eng
text: Turbulence is the major cause of friction losses in transport processes and
it is responsible for a drastic drag increase in flows over bounding surfaces.
While much effort is invested into developing ways to control and reduce turbulence
intensities, so far no methods exist to altogether eliminate turbulence if velocities
are sufficiently large. We demonstrate for pipe flow that appropriate distortions
to the velocity profile lead to a complete collapse of turbulence and subsequently
friction losses are reduced by as much as 90%. Counterintuitively, the return
to laminar motion is accomplished by initially increasing turbulence intensities
or by transiently amplifying wall shear. Since neither the Reynolds number nor
the shear stresses decrease (the latter often increase), these measures are not
indicative of turbulence collapse. Instead, an amplification mechanism measuring
the interaction between eddies and the mean shear is found to set a threshold
below which turbulence is suppressed beyond recovery.
acknowledgement: We acknowledge the European Research Council under the European Union’s
Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement 306589, the European
Research Council (ERC) under the European Union’s Horizon 2020 research and innovation
programme (grant agreement no. 737549) and the Deutsche Forschungsgemeinschaft (Project
No. FOR 1182) for financial support. We thank our technician P. Maier for providing
highly valuable ideas and greatly supporting us in all technical aspects. We thank
M. Schaner for technical drawings, construction and design. We thank M. Schwegel
for a Matlab code to post-process experimental data.
article_processing_charge: No
author:
- first_name: Jakob
full_name: Kühnen, Jakob
id: 3A47AE32-F248-11E8-B48F-1D18A9856A87
last_name: Kühnen
orcid: 0000-0003-4312-0179
- first_name: Baofang
full_name: Song, Baofang
last_name: Song
- first_name: Davide
full_name: Scarselli, Davide
id: 40315C30-F248-11E8-B48F-1D18A9856A87
last_name: Scarselli
orcid: 0000-0001-5227-4271
- first_name: Nazmi B
full_name: Budanur, Nazmi B
id: 3EA1010E-F248-11E8-B48F-1D18A9856A87
last_name: Budanur
orcid: 0000-0003-0423-5010
- first_name: Michael
full_name: Riedl, Michael
id: 3BE60946-F248-11E8-B48F-1D18A9856A87
last_name: Riedl
orcid: 0000-0003-4844-6311
- first_name: Ashley
full_name: Willis, Ashley
last_name: Willis
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Kühnen J, Song B, Scarselli D, et al. Destabilizing turbulence in pipe flow.
Nature Physics. 2018;14:386-390. doi:10.1038/s41567-017-0018-3
apa: Kühnen, J., Song, B., Scarselli, D., Budanur, N. B., Riedl, M., Willis, A.,
… Hof, B. (2018). Destabilizing turbulence in pipe flow. Nature Physics.
Nature Publishing Group. https://doi.org/10.1038/s41567-017-0018-3
chicago: Kühnen, Jakob, Baofang Song, Davide Scarselli, Nazmi B Budanur, Michael
Riedl, Ashley Willis, Marc Avila, and Björn Hof. “Destabilizing Turbulence in
Pipe Flow.” Nature Physics. Nature Publishing Group, 2018. https://doi.org/10.1038/s41567-017-0018-3.
ieee: J. Kühnen et al., “Destabilizing turbulence in pipe flow,” Nature
Physics, vol. 14. Nature Publishing Group, pp. 386–390, 2018.
ista: Kühnen J, Song B, Scarselli D, Budanur NB, Riedl M, Willis A, Avila M, Hof
B. 2018. Destabilizing turbulence in pipe flow. Nature Physics. 14, 386–390.
mla: Kühnen, Jakob, et al. “Destabilizing Turbulence in Pipe Flow.” Nature Physics,
vol. 14, Nature Publishing Group, 2018, pp. 386–90, doi:10.1038/s41567-017-0018-3.
short: J. Kühnen, B. Song, D. Scarselli, N.B. Budanur, M. Riedl, A. Willis, M. Avila,
B. Hof, Nature Physics 14 (2018) 386–390.
date_created: 2018-12-11T11:46:36Z
date_published: 2018-01-08T00:00:00Z
date_updated: 2024-03-25T23:30:20Z
day: '08'
department:
- _id: BjHo
doi: 10.1038/s41567-017-0018-3
ec_funded: 1
external_id:
isi:
- '000429434100020'
intvolume: ' 14'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1711.06543
month: '01'
oa: 1
oa_version: Preprint
page: 386-390
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 25104D44-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '737549'
name: Eliminating turbulence in oil pipelines
publication: Nature Physics
publication_status: published
publisher: Nature Publishing Group
publist_id: '7360'
quality_controlled: '1'
related_material:
record:
- id: '12726'
relation: dissertation_contains
status: public
- id: '14530'
relation: dissertation_contains
status: public
- id: '7258'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Destabilizing turbulence in pipe flow
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 14
year: '2018'
...
---
_id: '5996'
abstract:
- lang: eng
text: 'In pipes, turbulence sets in despite the linear stability of the laminar
Hagen–Poiseuille flow. The Reynolds number ( ) for which turbulence first appears
in a given experiment – the ‘natural transition point’ – depends on imperfections
of the set-up, or, more precisely, on the magnitude of finite amplitude perturbations.
At onset, turbulence typically only occupies a certain fraction of the flow, and
this fraction equally is found to differ from experiment to experiment. Despite
these findings, Reynolds proposed that after sufficiently long times, flows may
settle to steady conditions: below a critical velocity, flows should (regardless
of initial conditions) always return to laminar, while above this velocity, eddying
motion should persist. As will be shown, even in pipes several thousand diameters
long, the spatio-temporal intermittent flow patterns observed at the end of the
pipe strongly depend on the initial conditions, and there is no indication that
different flow patterns would eventually settle to a (statistical) steady state.
Exploiting the fact that turbulent puffs do not age (i.e. they are memoryless),
we continuously recreate the puff sequence exiting the pipe at the pipe entrance,
and in doing so introduce periodic boundary conditions for the puff pattern. This
procedure allows us to study the evolution of the flow patterns for arbitrary
long times, and we find that after times in excess of advective time units, indeed
a statistical steady state is reached. Although the resulting flows remain spatio-temporally
intermittent, puff splitting and decay rates eventually reach a balance, so that
the turbulent fraction fluctuates around a well-defined level which only depends
on . In accordance with Reynolds’ proposition, we find that at lower (here 2020),
flows eventually always resume to laminar, while for higher ( ), turbulence persists.
The critical point for pipe flow hence falls in the interval of $2020 , which
is in very good agreement with the recently proposed value of . The latter estimate
was based on single-puff statistics and entirely neglected puff interactions.
Unlike in typical contact processes where such interactions strongly affect the
percolation threshold, in pipe flow, the critical point is only marginally influenced.
Interactions, on the other hand, are responsible for the approach to the statistical
steady state. As shown, they strongly affect the resulting flow patterns, where
they cause ‘puff clustering’, and these regions of large puff densities are observed
to travel across the puff pattern in a wave-like fashion.'
acknowledgement: ' We also thank Philipp Maier and the IST Austria workshop for theirdedicated
technical support'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Mukund
full_name: Vasudevan, Mukund
id: 3C5A959A-F248-11E8-B48F-1D18A9856A87
last_name: Vasudevan
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Vasudevan M, Hof B. The critical point of the transition to turbulence in pipe
flow. Journal of Fluid Mechanics. 2018;839:76-94. doi:10.1017/jfm.2017.923
apa: Vasudevan, M., & Hof, B. (2018). The critical point of the transition to
turbulence in pipe flow. Journal of Fluid Mechanics. Cambridge University
Press. https://doi.org/10.1017/jfm.2017.923
chicago: Vasudevan, Mukund, and Björn Hof. “The Critical Point of the Transition
to Turbulence in Pipe Flow.” Journal of Fluid Mechanics. Cambridge University
Press, 2018. https://doi.org/10.1017/jfm.2017.923.
ieee: M. Vasudevan and B. Hof, “The critical point of the transition to turbulence
in pipe flow,” Journal of Fluid Mechanics, vol. 839. Cambridge University
Press, pp. 76–94, 2018.
ista: Vasudevan M, Hof B. 2018. The critical point of the transition to turbulence
in pipe flow. Journal of Fluid Mechanics. 839, 76–94.
mla: Vasudevan, Mukund, and Björn Hof. “The Critical Point of the Transition to
Turbulence in Pipe Flow.” Journal of Fluid Mechanics, vol. 839, Cambridge
University Press, 2018, pp. 76–94, doi:10.1017/jfm.2017.923.
short: M. Vasudevan, B. Hof, Journal of Fluid Mechanics 839 (2018) 76–94.
date_created: 2019-02-14T12:50:50Z
date_published: 2018-03-25T00:00:00Z
date_updated: 2023-09-19T14:37:49Z
day: '25'
department:
- _id: BjHo
doi: 10.1017/jfm.2017.923
ec_funded: 1
external_id:
arxiv:
- '1709.06372'
isi:
- '000437858300003'
intvolume: ' 839'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1709.06372
month: '03'
oa: 1
oa_version: Preprint
page: 76-94
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Journal of Fluid Mechanics
publication_identifier:
eissn:
- 1469-7645
issn:
- 0022-1120
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: The critical point of the transition to turbulence in pipe flow
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 839
year: '2018'
...
---
_id: '422'
abstract:
- lang: eng
text: We show that a rather simple, steady modification of the streamwise velocity
profile in a pipe can lead to a complete collapse of turbulence and the flow fully
relaminarizes. Two different devices, a stationary obstacle (inset) and a device
which injects fluid through an annular gap close to the wall, are used to control
the flow. Both devices modify the streamwise velocity profile such that the flow
in the center of the pipe is decelerated and the flow in the near wall region
is accelerated. We present measurements with stereoscopic particle image velocimetry
to investigate and capture the development of the relaminarizing flow downstream
these devices and the specific circumstances responsible for relaminarization.
We find total relaminarization up to Reynolds numbers of 6000, where the skin
friction in the far downstream distance is reduced by a factor of 3.4 due to relaminarization.
In a smooth straight pipe the flow remains completely laminar downstream of the
control. Furthermore, we show that transient (temporary) relaminarization in a
spatially confined region right downstream the devices occurs also at much higher
Reynolds numbers, accompanied by a significant local skin friction drag reduction.
The underlying physical mechanism of relaminarization is attributed to a weakening
of the near-wall turbulence production cycle.
article_processing_charge: Yes (via OA deal)
author:
- first_name: Jakob
full_name: Kühnen, Jakob
id: 3A47AE32-F248-11E8-B48F-1D18A9856A87
last_name: Kühnen
orcid: 0000-0003-4312-0179
- first_name: Davide
full_name: Scarselli, Davide
id: 40315C30-F248-11E8-B48F-1D18A9856A87
last_name: Scarselli
orcid: 0000-0001-5227-4271
- first_name: Markus
full_name: Schaner, Markus
id: 316CE034-F248-11E8-B48F-1D18A9856A87
last_name: Schaner
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Kühnen J, Scarselli D, Schaner M, Hof B. Relaminarization by steady modification
of the streamwise velocity profile in a pipe. Flow Turbulence and Combustion.
2018;100(4):919-942. doi:10.1007/s10494-018-9896-4
apa: Kühnen, J., Scarselli, D., Schaner, M., & Hof, B. (2018). Relaminarization
by steady modification of the streamwise velocity profile in a pipe. Flow Turbulence
and Combustion. Springer. https://doi.org/10.1007/s10494-018-9896-4
chicago: Kühnen, Jakob, Davide Scarselli, Markus Schaner, and Björn Hof. “Relaminarization
by Steady Modification of the Streamwise Velocity Profile in a Pipe.” Flow
Turbulence and Combustion. Springer, 2018. https://doi.org/10.1007/s10494-018-9896-4.
ieee: J. Kühnen, D. Scarselli, M. Schaner, and B. Hof, “Relaminarization by steady
modification of the streamwise velocity profile in a pipe,” Flow Turbulence
and Combustion, vol. 100, no. 4. Springer, pp. 919–942, 2018.
ista: Kühnen J, Scarselli D, Schaner M, Hof B. 2018. Relaminarization by steady
modification of the streamwise velocity profile in a pipe. Flow Turbulence and
Combustion. 100(4), 919–942.
mla: Kühnen, Jakob, et al. “Relaminarization by Steady Modification of the Streamwise
Velocity Profile in a Pipe.” Flow Turbulence and Combustion, vol. 100,
no. 4, Springer, 2018, pp. 919–42, doi:10.1007/s10494-018-9896-4.
short: J. Kühnen, D. Scarselli, M. Schaner, B. Hof, Flow Turbulence and Combustion
100 (2018) 919–942.
date_created: 2018-12-11T11:46:23Z
date_published: 2018-01-01T00:00:00Z
date_updated: 2024-03-25T23:30:20Z
day: '01'
ddc:
- '530'
department:
- _id: BjHo
doi: 10.1007/s10494-018-9896-4
ec_funded: 1
external_id:
isi:
- '000433113900004'
file:
- access_level: open_access
checksum: d7c0bade150faabca150b0a9986e60ca
content_type: application/pdf
creator: dernst
date_created: 2018-12-17T15:52:37Z
date_updated: 2020-07-14T12:46:25Z
file_id: '5717'
file_name: 2018_FlowTurbulenceCombust_Kuehnen.pdf
file_size: 2210020
relation: main_file
file_date_updated: 2020-07-14T12:46:25Z
has_accepted_license: '1'
intvolume: ' 100'
isi: 1
issue: '4'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '01'
oa: 1
oa_version: Published Version
page: 919 - 942
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Flow Turbulence and Combustion
publication_status: published
publisher: Springer
publist_id: '7401'
quality_controlled: '1'
related_material:
record:
- id: '7258'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Relaminarization by steady modification of the streamwise velocity profile
in a pipe
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 100
year: '2018'
...
---
_id: '1087'
abstract:
- lang: eng
text: Using extensive direct numerical simulations, the dynamics of laminar-turbulent
fronts in pipe flow is investigated for Reynolds numbers between and 5500. We
here investigate the physical distinction between the fronts of weak and strong
slugs both by analysing the turbulent kinetic energy budget and by comparing the
downstream front motion to the advection speed of bulk turbulent structures. Our
study shows that weak downstream fronts travel slower than turbulent structures
in the bulk and correspond to decaying turbulence at the front. At the downstream
front speed becomes faster than the advection speed, marking the onset of strong
fronts. In contrast to weak fronts, turbulent eddies are generated at strong fronts
by feeding on the downstream laminar flow. Our study also suggests that temporal
fluctuations of production and dissipation at the downstream laminar-turbulent
front drive the dynamical switches between the two types of front observed up
to.
acknowledged_ssus:
- _id: ScienComp
article_processing_charge: No
author:
- first_name: Baofang
full_name: Song, Baofang
last_name: Song
- first_name: Dwight
full_name: Barkley, Dwight
last_name: Barkley
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
citation:
ama: Song B, Barkley D, Hof B, Avila M. Speed and structure of turbulent fronts
in pipe flow. Journal of Fluid Mechanics. 2017;813:1045-1059. doi:10.1017/jfm.2017.14
apa: Song, B., Barkley, D., Hof, B., & Avila, M. (2017). Speed and structure
of turbulent fronts in pipe flow. Journal of Fluid Mechanics. Cambridge
University Press. https://doi.org/10.1017/jfm.2017.14
chicago: Song, Baofang, Dwight Barkley, Björn Hof, and Marc Avila. “Speed and Structure
of Turbulent Fronts in Pipe Flow.” Journal of Fluid Mechanics. Cambridge
University Press, 2017. https://doi.org/10.1017/jfm.2017.14.
ieee: B. Song, D. Barkley, B. Hof, and M. Avila, “Speed and structure of turbulent
fronts in pipe flow,” Journal of Fluid Mechanics, vol. 813. Cambridge University
Press, pp. 1045–1059, 2017.
ista: Song B, Barkley D, Hof B, Avila M. 2017. Speed and structure of turbulent
fronts in pipe flow. Journal of Fluid Mechanics. 813, 1045–1059.
mla: Song, Baofang, et al. “Speed and Structure of Turbulent Fronts in Pipe Flow.”
Journal of Fluid Mechanics, vol. 813, Cambridge University Press, 2017,
pp. 1045–59, doi:10.1017/jfm.2017.14.
short: B. Song, D. Barkley, B. Hof, M. Avila, Journal of Fluid Mechanics 813 (2017)
1045–1059.
date_created: 2018-12-11T11:50:04Z
date_published: 2017-02-25T00:00:00Z
date_updated: 2023-09-20T11:47:22Z
day: '25'
department:
- _id: BjHo
doi: 10.1017/jfm.2017.14
ec_funded: 1
external_id:
isi:
- '000394376400044'
intvolume: ' 813'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1603.04077
month: '02'
oa: 1
oa_version: Submitted Version
page: 1045 - 1059
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Journal of Fluid Mechanics
publication_identifier:
issn:
- '00221120'
publication_status: published
publisher: Cambridge University Press
publist_id: '6290'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Speed and structure of turbulent fronts in pipe flow
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 813
year: '2017'
...
---
_id: '745'
abstract:
- lang: eng
text: 'Fluid flows in nature and applications are frequently subject to periodic
velocity modulations. Surprisingly, even for the generic case of flow through
a straight pipe, there is little consensus regarding the influence of pulsation
on the transition threshold to turbulence: while most studies predict a monotonically
increasing threshold with pulsation frequency (i.e. Womersley number, ), others
observe a decreasing threshold for identical parameters and only observe an increasing
threshold at low . In the present study we apply recent advances in the understanding
of transition in steady shear flows to pulsating pipe flow. For moderate pulsation
amplitudes we find that the first instability encountered is subcritical (i.e.
requiring finite amplitude disturbances) and gives rise to localized patches of
turbulence (''puffs'') analogous to steady pipe flow. By monitoring the impact
of pulsation on the lifetime of turbulence we map the onset of turbulence in parameter
space. Transition in pulsatile flow can be separated into three regimes. At small
Womersley numbers the dynamics is dominated by the decay turbulence suffers during
the slower part of the cycle and hence transition is delayed significantly. As
shown in this regime thresholds closely agree with estimates based on a quasi-steady
flow assumption only taking puff decay rates into account. The transition point
predicted in the zero limit equals to the critical point for steady pipe flow
offset by the oscillation Reynolds number (i.e. the dimensionless oscillation
amplitude). In the high frequency limit on the other hand, puff lifetimes are
identical to those in steady pipe flow and hence the transition threshold appears
to be unaffected by flow pulsation. In the intermediate frequency regime the transition
threshold sharply drops (with increasing ) from the decay dominated (quasi-steady)
threshold to the steady pipe flow level.'
article_processing_charge: No
author:
- first_name: Duo
full_name: Xu, Duo
id: 3454D55E-F248-11E8-B48F-1D18A9856A87
last_name: Xu
- first_name: Sascha
full_name: Warnecke, Sascha
last_name: Warnecke
- first_name: Baofang
full_name: Song, Baofang
last_name: Song
- first_name: Xingyu
full_name: Ma, Xingyu
id: 34BADBA6-F248-11E8-B48F-1D18A9856A87
last_name: Ma
orcid: 0000-0002-0179-9737
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Xu D, Warnecke S, Song B, Ma X, Hof B. Transition to turbulence in pulsating
pipe flow. Journal of Fluid Mechanics. 2017;831:418-432. doi:10.1017/jfm.2017.620
apa: Xu, D., Warnecke, S., Song, B., Ma, X., & Hof, B. (2017). Transition to
turbulence in pulsating pipe flow. Journal of Fluid Mechanics. Cambridge
University Press. https://doi.org/10.1017/jfm.2017.620
chicago: Xu, Duo, Sascha Warnecke, Baofang Song, Xingyu Ma, and Björn Hof. “Transition
to Turbulence in Pulsating Pipe Flow.” Journal of Fluid Mechanics. Cambridge
University Press, 2017. https://doi.org/10.1017/jfm.2017.620.
ieee: D. Xu, S. Warnecke, B. Song, X. Ma, and B. Hof, “Transition to turbulence
in pulsating pipe flow,” Journal of Fluid Mechanics, vol. 831. Cambridge
University Press, pp. 418–432, 2017.
ista: Xu D, Warnecke S, Song B, Ma X, Hof B. 2017. Transition to turbulence in pulsating
pipe flow. Journal of Fluid Mechanics. 831, 418–432.
mla: Xu, Duo, et al. “Transition to Turbulence in Pulsating Pipe Flow.” Journal
of Fluid Mechanics, vol. 831, Cambridge University Press, 2017, pp. 418–32,
doi:10.1017/jfm.2017.620.
short: D. Xu, S. Warnecke, B. Song, X. Ma, B. Hof, Journal of Fluid Mechanics 831
(2017) 418–432.
date_created: 2018-12-11T11:48:17Z
date_published: 2017-11-25T00:00:00Z
date_updated: 2023-09-27T12:28:12Z
day: '25'
department:
- _id: BjHo
doi: 10.1017/jfm.2017.620
ec_funded: 1
external_id:
isi:
- '000412934800005'
intvolume: ' 831'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1709.03738
month: '11'
oa: 1
oa_version: Submitted Version
page: 418 - 432
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Journal of Fluid Mechanics
publication_identifier:
issn:
- '00221120'
publication_status: published
publisher: Cambridge University Press
publist_id: '6922'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Transition to turbulence in pulsating pipe flow
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 831
year: '2017'
...
---
_id: '661'
abstract:
- lang: eng
text: During embryonic development, mechanical forces are essential for cellular
rearrangements driving tissue morphogenesis. Here, we show that in the early zebrafish
embryo, friction forces are generated at the interface between anterior axial
mesoderm (prechordal plate, ppl) progenitors migrating towards the animal pole
and neurectoderm progenitors moving in the opposite direction towards the vegetal
pole of the embryo. These friction forces lead to global rearrangement of cells
within the neurectoderm and determine the position of the neural anlage. Using
a combination of experiments and simulations, we show that this process depends
on hydrodynamic coupling between neurectoderm and ppl as a result of E-cadherin-mediated
adhesion between those tissues. Our data thus establish the emergence of friction
forces at the interface between moving tissues as a critical force-generating
process shaping the embryo.
acknowledged_ssus:
- _id: SSU
author:
- first_name: Michael
full_name: Smutny, Michael
id: 3FE6E4E8-F248-11E8-B48F-1D18A9856A87
last_name: Smutny
orcid: 0000-0002-5920-9090
- first_name: Zsuzsa
full_name: Ákos, Zsuzsa
last_name: Ákos
- first_name: Silvia
full_name: Grigolon, Silvia
last_name: Grigolon
- first_name: Shayan
full_name: Shamipour, Shayan
id: 40B34FE2-F248-11E8-B48F-1D18A9856A87
last_name: Shamipour
- first_name: Verena
full_name: Ruprecht, Verena
last_name: Ruprecht
- first_name: Daniel
full_name: Capek, Daniel
id: 31C42484-F248-11E8-B48F-1D18A9856A87
last_name: Capek
orcid: 0000-0001-5199-9940
- first_name: Martin
full_name: Behrndt, Martin
id: 3ECECA3A-F248-11E8-B48F-1D18A9856A87
last_name: Behrndt
- first_name: Ekaterina
full_name: Papusheva, Ekaterina
id: 41DB591E-F248-11E8-B48F-1D18A9856A87
last_name: Papusheva
- first_name: Masazumi
full_name: Tada, Masazumi
last_name: Tada
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
- first_name: Tamás
full_name: Vicsek, Tamás
last_name: Vicsek
- first_name: Guillaume
full_name: Salbreux, Guillaume
last_name: Salbreux
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Smutny M, Ákos Z, Grigolon S, et al. Friction forces position the neural anlage.
Nature Cell Biology. 2017;19:306-317. doi:10.1038/ncb3492
apa: Smutny, M., Ákos, Z., Grigolon, S., Shamipour, S., Ruprecht, V., Capek, D.,
… Heisenberg, C.-P. J. (2017). Friction forces position the neural anlage. Nature
Cell Biology. Nature Publishing Group. https://doi.org/10.1038/ncb3492
chicago: Smutny, Michael, Zsuzsa Ákos, Silvia Grigolon, Shayan Shamipour, Verena
Ruprecht, Daniel Capek, Martin Behrndt, et al. “Friction Forces Position the Neural
Anlage.” Nature Cell Biology. Nature Publishing Group, 2017. https://doi.org/10.1038/ncb3492.
ieee: M. Smutny et al., “Friction forces position the neural anlage,” Nature
Cell Biology, vol. 19. Nature Publishing Group, pp. 306–317, 2017.
ista: Smutny M, Ákos Z, Grigolon S, Shamipour S, Ruprecht V, Capek D, Behrndt M,
Papusheva E, Tada M, Hof B, Vicsek T, Salbreux G, Heisenberg C-PJ. 2017. Friction
forces position the neural anlage. Nature Cell Biology. 19, 306–317.
mla: Smutny, Michael, et al. “Friction Forces Position the Neural Anlage.” Nature
Cell Biology, vol. 19, Nature Publishing Group, 2017, pp. 306–17, doi:10.1038/ncb3492.
short: M. Smutny, Z. Ákos, S. Grigolon, S. Shamipour, V. Ruprecht, D. Capek, M.
Behrndt, E. Papusheva, M. Tada, B. Hof, T. Vicsek, G. Salbreux, C.-P.J. Heisenberg,
Nature Cell Biology 19 (2017) 306–317.
date_created: 2018-12-11T11:47:46Z
date_published: 2017-03-27T00:00:00Z
date_updated: 2024-03-25T23:30:21Z
day: '27'
department:
- _id: CaHe
- _id: BjHo
- _id: Bio
doi: 10.1038/ncb3492
ec_funded: 1
external_id:
pmid:
- '28346437'
intvolume: ' 19'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://europepmc.org/articles/pmc5635970
month: '03'
oa: 1
oa_version: Submitted Version
page: 306 - 317
pmid: 1
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 252ABD0A-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I 930-B20
name: Control of Epithelial Cell Layer Spreading in Zebrafish
publication: Nature Cell Biology
publication_identifier:
issn:
- '14657392'
publication_status: published
publisher: Nature Publishing Group
publist_id: '7074'
quality_controlled: '1'
related_material:
record:
- id: '50'
relation: dissertation_contains
status: public
- id: '8350'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Friction forces position the neural anlage
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 19
year: '2017'
...
---
_id: '1494'
abstract:
- lang: eng
text: Turbulence is one of the most frequently encountered non-equilibrium phenomena
in nature, yet characterizing the transition that gives rise to turbulence in
basic shear flows has remained an elusive task. Although, in recent studies, critical
points marking the onset of sustained turbulence have been determined for several
such flows, the physical nature of the transition could not be fully explained.
In extensive experimental and computational studies we show for the example of
Couette flow that the onset of turbulence is a second-order phase transition and
falls into the directed percolation universality class. Consequently, the complex
laminar–turbulent patterns distinctive for the onset of turbulence in shear flows
result from short-range interactions of turbulent domains and are characterized
by universal critical exponents. More generally, our study demonstrates that even
high-dimensional systems far from equilibrium such as turbulence exhibit universality
at onset and that here the collective dynamics obeys simple rules.
acknowledgement: We thank P. Maier for providing valuable ideas and supporting us
in the technical aspects. Discussions with D. Barkley, Y. Duguet, B. Eckhart, N.
Goldenfeld, P. Manneville and K. Takeuchi are gratefully acknowledged. We acknowledge
the Deutsche Forschungsgemeinschaft (Project No. FOR 1182), and the European Research
Council under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC
Grant Agreement 306589 for financial support. L.S. and B.H. acknowledge research
funding by Deutsche Forschungsgemeinschaft (DFG) under Grant No. SFB 963/1 (project
A8). Numerical simulations were performed thanks to the CPU time allocations of
JUROPA in Juelich Supercomputing Center (project HGU17) and of the Max Planck Computing
and Data Facility (Garching, Germany). Excellent technical support from M. Rampp
on the hybrid code nsCouette is appreciated.
author:
- first_name: Grégoire M
full_name: Lemoult, Grégoire M
id: 4787FE80-F248-11E8-B48F-1D18A9856A87
last_name: Lemoult
- first_name: Liang
full_name: Shi, Liang
id: 374A3F1A-F248-11E8-B48F-1D18A9856A87
last_name: Shi
- first_name: Kerstin
full_name: Avila, Kerstin
last_name: Avila
- first_name: Shreyas V
full_name: Jalikop, Shreyas V
id: 44A1D772-F248-11E8-B48F-1D18A9856A87
last_name: Jalikop
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Lemoult GM, Shi L, Avila K, Jalikop SV, Avila M, Hof B. Directed percolation
phase transition to sustained turbulence in Couette flow. Nature Physics.
2016;12(3):254-258. doi:10.1038/nphys3675
apa: Lemoult, G. M., Shi, L., Avila, K., Jalikop, S. V., Avila, M., & Hof, B.
(2016). Directed percolation phase transition to sustained turbulence in Couette
flow. Nature Physics. Nature Publishing Group. https://doi.org/10.1038/nphys3675
chicago: Lemoult, Grégoire M, Liang Shi, Kerstin Avila, Shreyas V Jalikop, Marc
Avila, and Björn Hof. “Directed Percolation Phase Transition to Sustained Turbulence
in Couette Flow.” Nature Physics. Nature Publishing Group, 2016. https://doi.org/10.1038/nphys3675.
ieee: G. M. Lemoult, L. Shi, K. Avila, S. V. Jalikop, M. Avila, and B. Hof, “Directed
percolation phase transition to sustained turbulence in Couette flow,” Nature
Physics, vol. 12, no. 3. Nature Publishing Group, pp. 254–258, 2016.
ista: Lemoult GM, Shi L, Avila K, Jalikop SV, Avila M, Hof B. 2016. Directed percolation
phase transition to sustained turbulence in Couette flow. Nature Physics. 12(3),
254–258.
mla: Lemoult, Grégoire M., et al. “Directed Percolation Phase Transition to Sustained
Turbulence in Couette Flow.” Nature Physics, vol. 12, no. 3, Nature Publishing
Group, 2016, pp. 254–58, doi:10.1038/nphys3675.
short: G.M. Lemoult, L. Shi, K. Avila, S.V. Jalikop, M. Avila, B. Hof, Nature Physics
12 (2016) 254–258.
date_created: 2018-12-11T11:52:21Z
date_published: 2016-02-15T00:00:00Z
date_updated: 2021-01-12T06:51:08Z
day: '15'
department:
- _id: BjHo
doi: 10.1038/nphys3675
ec_funded: 1
intvolume: ' 12'
issue: '3'
language:
- iso: eng
month: '02'
oa_version: None
page: 254 - 258
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 2511D90C-B435-11E9-9278-68D0E5697425
grant_number: SFB 963 TP A8
name: Astrophysical instability of currents and turbulences
publication: Nature Physics
publication_status: published
publisher: Nature Publishing Group
publist_id: '5685'
quality_controlled: '1'
scopus_import: 1
status: public
title: Directed percolation phase transition to sustained turbulence in Couette flow
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 12
year: '2016'
...
---
_id: '1664'
abstract:
- lang: eng
text: Over a century of research into the origin of turbulence in wall-bounded shear
flows has resulted in a puzzling picture in which turbulence appears in a variety
of different states competing with laminar background flow. At moderate flow speeds,
turbulence is confined to localized patches; it is only at higher speeds that
the entire flow becomes turbulent. The origin of the different states encountered
during this transition, the front dynamics of the turbulent regions and the transformation
to full turbulence have yet to be explained. By combining experiments, theory
and computer simulations, here we uncover a bifurcation scenario that explains
the transformation to fully turbulent pipe flow and describe the front dynamics
of the different states encountered in the process. Key to resolving this problem
is the interpretation of the flow as a bistable system with nonlinear propagation
(advection) of turbulent fronts. These findings bridge the gap between our understanding
of the onset of turbulence and fully turbulent flows.
acknowledgement: We acknowledge the Deutsche Forschungsgemeinschaft (Project No. FOR
1182), and the European Research Council under the European Union’s Seventh Framework
Programme (FP/2007-2013)/ERC Grant Agreement 306589 for financial support. B.S.
acknowledges financial support from the Chinese State Scholarship Fund under grant
number 2010629145. B.S. acknowledges support from the International Max Planck Research
School for the Physics of Biological and Complex Systems and the Göttingen Graduate
School for Neurosciences and Molecular Biosciences. We acknowledge computing resources
from GWDG (Gesellschaft für wissenschaftliche Datenverarbeitung Göttingen) and the
Jülich Supercomputing Centre (grant HGU16) where the simulations were performed.
author:
- first_name: Dwight
full_name: Barkley, Dwight
last_name: Barkley
- first_name: Baofang
full_name: Song, Baofang
last_name: Song
- first_name: Mukund
full_name: Vasudevan, Mukund
id: 3C5A959A-F248-11E8-B48F-1D18A9856A87
last_name: Vasudevan
- first_name: Grégoire M
full_name: Lemoult, Grégoire M
id: 4787FE80-F248-11E8-B48F-1D18A9856A87
last_name: Lemoult
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Barkley D, Song B, Vasudevan M, Lemoult GM, Avila M, Hof B. The rise of fully
turbulent flow. Nature. 2015;526(7574):550-553. doi:10.1038/nature15701
apa: Barkley, D., Song, B., Vasudevan, M., Lemoult, G. M., Avila, M., & Hof,
B. (2015). The rise of fully turbulent flow. Nature. Nature Publishing
Group. https://doi.org/10.1038/nature15701
chicago: Barkley, Dwight, Baofang Song, Mukund Vasudevan, Grégoire M Lemoult, Marc
Avila, and Björn Hof. “The Rise of Fully Turbulent Flow.” Nature. Nature
Publishing Group, 2015. https://doi.org/10.1038/nature15701.
ieee: D. Barkley, B. Song, M. Vasudevan, G. M. Lemoult, M. Avila, and B. Hof, “The
rise of fully turbulent flow,” Nature, vol. 526, no. 7574. Nature Publishing
Group, pp. 550–553, 2015.
ista: Barkley D, Song B, Vasudevan M, Lemoult GM, Avila M, Hof B. 2015. The rise
of fully turbulent flow. Nature. 526(7574), 550–553.
mla: Barkley, Dwight, et al. “The Rise of Fully Turbulent Flow.” Nature,
vol. 526, no. 7574, Nature Publishing Group, 2015, pp. 550–53, doi:10.1038/nature15701.
short: D. Barkley, B. Song, M. Vasudevan, G.M. Lemoult, M. Avila, B. Hof, Nature
526 (2015) 550–553.
date_created: 2018-12-11T11:53:20Z
date_published: 2015-10-21T00:00:00Z
date_updated: 2021-01-12T06:52:22Z
day: '21'
department:
- _id: BjHo
doi: 10.1038/nature15701
ec_funded: 1
intvolume: ' 526'
issue: '7574'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1510.09143
month: '10'
oa: 1
oa_version: Preprint
page: 550 - 553
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Nature
publication_status: published
publisher: Nature Publishing Group
publist_id: '5485'
quality_controlled: '1'
scopus_import: 1
status: public
title: The rise of fully turbulent flow
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 526
year: '2015'
...
---
_id: '1837'
abstract:
- lang: eng
text: 'Transition to turbulence in straight pipes occurs in spite of the linear
stability of the laminar Hagen-Poiseuille flow if both the amplitude of flow perturbations
and the Reynolds number Re exceed a minimum threshold (subcritical transition).
As the pipe curvature increases, centrifugal effects become important, modifying
the basic flow as well as the most unstable linear modes. If the curvature (tube-to-coiling
diameter d/D) is sufficiently large, a Hopf bifurcation (supercritical instability)
is encountered before turbulence can be excited (subcritical instability). We
trace the instability thresholds in the Re - d/D parameter space in the range
0.01 ≤ d/D\ ≤ 0.1 by means of laser-Doppler velocimetry and determine the point
where the subcritical and supercritical instabilities meet. Two different experimental
set-ups are used: a closed system where the pipe forms an axisymmetric torus and
an open system employing a helical pipe. Implications for the measurement of friction
factors in curved pipes are discussed.'
article_number: R3
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jakob
full_name: Kühnen, Jakob
id: 3A47AE32-F248-11E8-B48F-1D18A9856A87
last_name: Kühnen
orcid: 0000-0003-4312-0179
- first_name: P
full_name: Braunshier, P
last_name: Braunshier
- first_name: M
full_name: Schwegel, M
last_name: Schwegel
- first_name: Hendrik
full_name: Kuhlmann, Hendrik
last_name: Kuhlmann
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Kühnen J, Braunshier P, Schwegel M, Kuhlmann H, Hof B. Subcritical versus supercritical
transition to turbulence in curved pipes. Journal of Fluid Mechanics. 2015;770(5).
doi:10.1017/jfm.2015.184
apa: Kühnen, J., Braunshier, P., Schwegel, M., Kuhlmann, H., & Hof, B. (2015).
Subcritical versus supercritical transition to turbulence in curved pipes. Journal
of Fluid Mechanics. Cambridge University Press. https://doi.org/10.1017/jfm.2015.184
chicago: Kühnen, Jakob, P Braunshier, M Schwegel, Hendrik Kuhlmann, and Björn Hof.
“Subcritical versus Supercritical Transition to Turbulence in Curved Pipes.” Journal
of Fluid Mechanics. Cambridge University Press, 2015. https://doi.org/10.1017/jfm.2015.184.
ieee: J. Kühnen, P. Braunshier, M. Schwegel, H. Kuhlmann, and B. Hof, “Subcritical
versus supercritical transition to turbulence in curved pipes,” Journal of
Fluid Mechanics, vol. 770, no. 5. Cambridge University Press, 2015.
ista: Kühnen J, Braunshier P, Schwegel M, Kuhlmann H, Hof B. 2015. Subcritical versus
supercritical transition to turbulence in curved pipes. Journal of Fluid Mechanics.
770(5), R3.
mla: Kühnen, Jakob, et al. “Subcritical versus Supercritical Transition to Turbulence
in Curved Pipes.” Journal of Fluid Mechanics, vol. 770, no. 5, R3, Cambridge
University Press, 2015, doi:10.1017/jfm.2015.184.
short: J. Kühnen, P. Braunshier, M. Schwegel, H. Kuhlmann, B. Hof, Journal of Fluid
Mechanics 770 (2015).
date_created: 2018-12-11T11:54:17Z
date_published: 2015-04-08T00:00:00Z
date_updated: 2021-01-12T06:53:31Z
day: '08'
department:
- _id: BjHo
doi: 10.1017/jfm.2015.184
ec_funded: 1
external_id:
arxiv:
- '1508.06559'
intvolume: ' 770'
issue: '5'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1508.06559
month: '04'
oa: 1
oa_version: Preprint
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Journal of Fluid Mechanics
publication_status: published
publisher: Cambridge University Press
publist_id: '5265'
quality_controlled: '1'
scopus_import: 1
status: public
title: Subcritical versus supercritical transition to turbulence in curved pipes
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 770
year: '2015'
...
---
_id: '2811'
abstract:
- lang: eng
text: 'In pipe, channel, and boundary layer flows turbulence first occurs intermittently
in space and time: at moderate Reynolds numbers domains of disordered turbulent
motion are separated by quiescent laminar regions. Based on direct numerical simulations
of pipe flow we argue here that the spatial intermittency has its origin in a
nearest neighbor interaction between turbulent regions. We further show that in
this regime turbulent flows are intrinsically intermittent with a well-defined
equilibrium turbulent fraction but without ever assuming a steady pattern. This
transition scenario is analogous to that found in simple models such as coupled
map lattices. The scaling observed implies that laminar intermissions of the turbulent
flow will persist to arbitrarily large Reynolds numbers.'
article_number: '063012'
arxiv: 1
author:
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Avila M, Hof B. Nature of laminar-turbulence intermittency in shear flows.
Physical Review E. 2013;87(6). doi:10.1103/PhysRevE.87.063012
apa: Avila, M., & Hof, B. (2013). Nature of laminar-turbulence intermittency
in shear flows. Physical Review E. American Institute of Physics. https://doi.org/10.1103/PhysRevE.87.063012
chicago: Avila, Marc, and Björn Hof. “Nature of Laminar-Turbulence Intermittency
in Shear Flows.” Physical Review E. American Institute of Physics, 2013.
https://doi.org/10.1103/PhysRevE.87.063012.
ieee: M. Avila and B. Hof, “Nature of laminar-turbulence intermittency in shear
flows,” Physical Review E, vol. 87, no. 6. American Institute of Physics,
2013.
ista: Avila M, Hof B. 2013. Nature of laminar-turbulence intermittency in shear
flows. Physical Review E. 87(6), 063012.
mla: Avila, Marc, and Björn Hof. “Nature of Laminar-Turbulence Intermittency in
Shear Flows.” Physical Review E, vol. 87, no. 6, 063012, American Institute
of Physics, 2013, doi:10.1103/PhysRevE.87.063012.
short: M. Avila, B. Hof, Physical Review E 87 (2013).
date_created: 2018-12-11T11:59:43Z
date_published: 2013-06-18T00:00:00Z
date_updated: 2021-01-12T06:59:53Z
day: '18'
department:
- _id: BjHo
doi: 10.1103/PhysRevE.87.063012
ec_funded: 1
external_id:
arxiv:
- '1306.5890'
intvolume: ' 87'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1306.5890
month: '06'
oa: 1
oa_version: Preprint
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Physical Review E
publication_status: published
publisher: American Institute of Physics
publist_id: '4074'
quality_controlled: '1'
scopus_import: 1
status: public
title: Nature of laminar-turbulence intermittency in shear flows
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 87
year: '2013'
...
---
_id: '2829'
abstract:
- lang: eng
text: Laminar-turbulent intermittency is intrinsic to the transitional regime of
a wide range of fluid flows including pipe, channel, boundary layer, and Couette
flow. In the latter turbulent spots can grow and form continuous stripes, yet
in the stripe-normal direction they remain interspersed by laminar fluid. We carry
out direct numerical simulations in a long narrow domain and observe that individual
turbulent stripes are transient. In agreement with recent observations in pipe
flow, we find that turbulence becomes sustained at a distinct critical point once
the spatial proliferation outweighs the inherent decaying process. By resolving
the asymptotic size distributions close to criticality we can for the first time
demonstrate scale invariance at the onset of turbulence.
article_number: '204502'
arxiv: 1
author:
- first_name: Liang
full_name: Shi, Liang
id: 374A3F1A-F248-11E8-B48F-1D18A9856A87
last_name: Shi
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Shi L, Avila M, Hof B. Scale invariance at the onset of turbulence in couette
flow. Physical Review Letters. 2013;110(20). doi:10.1103/PhysRevLett.110.204502
apa: Shi, L., Avila, M., & Hof, B. (2013). Scale invariance at the onset of
turbulence in couette flow. Physical Review Letters. American Physical
Society. https://doi.org/10.1103/PhysRevLett.110.204502
chicago: Shi, Liang, Marc Avila, and Björn Hof. “Scale Invariance at the Onset of
Turbulence in Couette Flow.” Physical Review Letters. American Physical
Society, 2013. https://doi.org/10.1103/PhysRevLett.110.204502.
ieee: L. Shi, M. Avila, and B. Hof, “Scale invariance at the onset of turbulence
in couette flow,” Physical Review Letters, vol. 110, no. 20. American Physical
Society, 2013.
ista: Shi L, Avila M, Hof B. 2013. Scale invariance at the onset of turbulence in
couette flow. Physical Review Letters. 110(20), 204502.
mla: Shi, Liang, et al. “Scale Invariance at the Onset of Turbulence in Couette
Flow.” Physical Review Letters, vol. 110, no. 20, 204502, American Physical
Society, 2013, doi:10.1103/PhysRevLett.110.204502.
short: L. Shi, M. Avila, B. Hof, Physical Review Letters 110 (2013).
date_created: 2018-12-11T11:59:49Z
date_published: 2013-05-13T00:00:00Z
date_updated: 2021-01-12T07:00:00Z
day: '13'
department:
- _id: BjHo
doi: 10.1103/PhysRevLett.110.204502
ec_funded: 1
external_id:
arxiv:
- '1304.5446'
intvolume: ' 110'
issue: '20'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1304.5446
month: '05'
oa: 1
oa_version: Preprint
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
- _id: 2511D90C-B435-11E9-9278-68D0E5697425
grant_number: SFB 963 TP A8
name: Astrophysical instability of currents and turbulences
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '3970'
quality_controlled: '1'
scopus_import: 1
status: public
title: Scale invariance at the onset of turbulence in couette flow
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 110
year: '2013'
...
---
_id: '2834'
abstract:
- lang: eng
text: Although the equations governing fluid flow are well known, there are no analytical
expressions that describe the complexity of turbulent motion. A recent proposition
is that in analogy to low dimensional chaotic systems, turbulence is organized
around unstable solutions of the governing equations which provide the building
blocks of the disordered dynamics. We report the discovery of periodic solutions
which just like intermittent turbulence are spatially localized and show that
turbulent transients arise from one such solution branch.
article_number: '224502'
arxiv: 1
author:
- first_name: Marc
full_name: Avila, Marc
last_name: Avila
- first_name: Fernando
full_name: Mellibovsky, Fernando
last_name: Mellibovsky
- first_name: Nicolas
full_name: Roland, Nicolas
last_name: Roland
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Avila M, Mellibovsky F, Roland N, Hof B. Streamwise-localized solutions at
the onset of turbulence in pipe flow. Physical Review Letters. 2013;110(22).
doi:10.1103/PhysRevLett.110.224502
apa: Avila, M., Mellibovsky, F., Roland, N., & Hof, B. (2013). Streamwise-localized
solutions at the onset of turbulence in pipe flow. Physical Review Letters.
American Physical Society. https://doi.org/10.1103/PhysRevLett.110.224502
chicago: Avila, Marc, Fernando Mellibovsky, Nicolas Roland, and Björn Hof. “Streamwise-Localized
Solutions at the Onset of Turbulence in Pipe Flow.” Physical Review Letters.
American Physical Society, 2013. https://doi.org/10.1103/PhysRevLett.110.224502.
ieee: M. Avila, F. Mellibovsky, N. Roland, and B. Hof, “Streamwise-localized solutions
at the onset of turbulence in pipe flow,” Physical Review Letters, vol.
110, no. 22. American Physical Society, 2013.
ista: Avila M, Mellibovsky F, Roland N, Hof B. 2013. Streamwise-localized solutions
at the onset of turbulence in pipe flow. Physical Review Letters. 110(22), 224502.
mla: Avila, Marc, et al. “Streamwise-Localized Solutions at the Onset of Turbulence
in Pipe Flow.” Physical Review Letters, vol. 110, no. 22, 224502, American
Physical Society, 2013, doi:10.1103/PhysRevLett.110.224502.
short: M. Avila, F. Mellibovsky, N. Roland, B. Hof, Physical Review Letters 110
(2013).
date_created: 2018-12-11T11:59:50Z
date_published: 2013-05-29T00:00:00Z
date_updated: 2021-01-12T07:00:05Z
day: '29'
department:
- _id: BjHo
doi: 10.1103/PhysRevLett.110.224502
ec_funded: 1
external_id:
arxiv:
- '1212.0230'
intvolume: ' 110'
issue: '22'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1212.0230
month: '05'
oa: 1
oa_version: Preprint
project:
- _id: 25152F3A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '306589'
name: Decoding the complexity of turbulence at its origin
publication: Physical Review Letters
publication_status: published
publisher: American Physical Society
publist_id: '3965'
quality_controlled: '1'
scopus_import: 1
status: public
title: Streamwise-localized solutions at the onset of turbulence in pipe flow
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 110
year: '2013'
...