---
_id: '14377'
abstract:
- lang: eng
text: Coherent flows of self-propelled particles are characterized by vortices and
jets that sustain chaotic flows, referred to as active turbulence. Here, we reveal
a crossover between defect-free active turbulence and active turbulence laden
with topological defects. Interestingly, we show that concurrent to the crossover
from defect-free to defect-laden active turbulence is the restoration of the previously
broken SO(2) symmetry signaled by the fast decay of the two-point correlations.
By stability analyses of the topological charge density field, we provide theoretical
insights on the criterion for the crossover to the defect-laden active turbulent
state. Despite the distinct symmetry features between these two active turbulence
regimes, the flow fluctuations exhibit universal statistical scaling behaviors
at large scales, while the spectrum of polarity fluctuations decays exponentially
at small length scales compared to the active energy injection length. These findings
reveal a dynamical crossover between distinct spatiotemporal organization patterns
in polar active matter.
article_number: '063101'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Benjamin H.
full_name: Andersen, Benjamin H.
last_name: Andersen
- first_name: Julian B
full_name: Renaud, Julian B
id: 7af6767d-14eb-11ed-b536-a32449ae867c
last_name: Renaud
- first_name: Jonas
full_name: Rønning, Jonas
last_name: Rønning
- first_name: Luiza
full_name: Angheluta, Luiza
last_name: Angheluta
- first_name: Amin
full_name: Doostmohammadi, Amin
last_name: Doostmohammadi
citation:
ama: Andersen BH, Renaud JB, Rønning J, Angheluta L, Doostmohammadi A. Symmetry-restoring
crossover from defect-free to defect-laden turbulence in polar active matter.
Physical Review Fluids. 2023;8(6). doi:10.1103/physrevfluids.8.063101
apa: Andersen, B. H., Renaud, J. B., Rønning, J., Angheluta, L., & Doostmohammadi,
A. (2023). Symmetry-restoring crossover from defect-free to defect-laden turbulence
in polar active matter. Physical Review Fluids. American Physical Society.
https://doi.org/10.1103/physrevfluids.8.063101
chicago: Andersen, Benjamin H., Julian B Renaud, Jonas Rønning, Luiza Angheluta,
and Amin Doostmohammadi. “Symmetry-Restoring Crossover from Defect-Free to Defect-Laden
Turbulence in Polar Active Matter.” Physical Review Fluids. American Physical
Society, 2023. https://doi.org/10.1103/physrevfluids.8.063101.
ieee: B. H. Andersen, J. B. Renaud, J. Rønning, L. Angheluta, and A. Doostmohammadi,
“Symmetry-restoring crossover from defect-free to defect-laden turbulence in polar
active matter,” Physical Review Fluids, vol. 8, no. 6. American Physical
Society, 2023.
ista: Andersen BH, Renaud JB, Rønning J, Angheluta L, Doostmohammadi A. 2023. Symmetry-restoring
crossover from defect-free to defect-laden turbulence in polar active matter.
Physical Review Fluids. 8(6), 063101.
mla: Andersen, Benjamin H., et al. “Symmetry-Restoring Crossover from Defect-Free
to Defect-Laden Turbulence in Polar Active Matter.” Physical Review Fluids,
vol. 8, no. 6, 063101, American Physical Society, 2023, doi:10.1103/physrevfluids.8.063101.
short: B.H. Andersen, J.B. Renaud, J. Rønning, L. Angheluta, A. Doostmohammadi,
Physical Review Fluids 8 (2023).
date_created: 2023-09-29T08:46:47Z
date_published: 2023-06-14T00:00:00Z
date_updated: 2023-10-03T07:25:39Z
day: '14'
doi: 10.1103/physrevfluids.8.063101
extern: '1'
external_id:
arxiv:
- '2209.10916'
intvolume: ' 8'
issue: '6'
keyword:
- Fluid Flow and Transfer Processes
- Modeling and Simulation
- Computational Mechanics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2209.10916
month: '06'
oa: 1
oa_version: Preprint
publication: Physical Review Fluids
publication_identifier:
issn:
- 2469-990X
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Symmetry-restoring crossover from defect-free to defect-laden turbulence in
polar active matter
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2023'
...
---
_id: '12279'
abstract:
- lang: eng
text: We report frictional drag reduction and a complete flow relaminarization of
elastic turbulence (ET) at vanishing inertia in a viscoelastic channel flow past
an obstacle. We show that the intensity of the observed elastic waves and wall-normal
vorticity correlate well with the measured drag above the onset of ET. Moreover,
we find that the elastic wave frequency grows with the Weissenberg number, and
at sufficiently high frequency it causes a decay of the elastic waves, resulting
in ET attenuation and drag reduction. Thus, this allows us to substantiate a physical
mechanism, involving the interaction of elastic waves with wall-normal vorticity
fluctuations, leading to the drag reduction and relaminarization phenomena at
low Reynolds number.
acknowledgement: "We thank G. Falkovich for discussion and Guy Han for technical support.
We are grateful to N. Jha for his help in µPIV measurements. This work is partially
supported by the grants from\r\nIsrael Science Foundation (ISF; grant #882/15 and
grant #784/19) and Binational USA-Israel Foundation (BSF;grant #2016145). "
article_number: L081301
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: M. Vijay
full_name: Kumar, M. Vijay
last_name: Kumar
- first_name: Atul
full_name: Varshney, Atul
id: 2A2006B2-F248-11E8-B48F-1D18A9856A87
last_name: Varshney
orcid: 0000-0002-3072-5999
- first_name: Dongyang
full_name: Li, Dongyang
last_name: Li
- first_name: Victor
full_name: Steinberg, Victor
last_name: Steinberg
citation:
ama: Kumar MV, Varshney A, Li D, Steinberg V. Relaminarization of elastic turbulence.
Physical Review Fluids. 2022;7(8). doi:10.1103/physrevfluids.7.l081301
apa: Kumar, M. V., Varshney, A., Li, D., & Steinberg, V. (2022). Relaminarization
of elastic turbulence. Physical Review Fluids. American Physical Society.
https://doi.org/10.1103/physrevfluids.7.l081301
chicago: Kumar, M. Vijay, Atul Varshney, Dongyang Li, and Victor Steinberg. “Relaminarization
of Elastic Turbulence.” Physical Review Fluids. American Physical Society,
2022. https://doi.org/10.1103/physrevfluids.7.l081301.
ieee: M. V. Kumar, A. Varshney, D. Li, and V. Steinberg, “Relaminarization of elastic
turbulence,” Physical Review Fluids, vol. 7, no. 8. American Physical Society,
2022.
ista: Kumar MV, Varshney A, Li D, Steinberg V. 2022. Relaminarization of elastic
turbulence. Physical Review Fluids. 7(8), L081301.
mla: Kumar, M. Vijay, et al. “Relaminarization of Elastic Turbulence.” Physical
Review Fluids, vol. 7, no. 8, L081301, American Physical Society, 2022, doi:10.1103/physrevfluids.7.l081301.
short: M.V. Kumar, A. Varshney, D. Li, V. Steinberg, Physical Review Fluids 7 (2022).
date_created: 2023-01-16T10:02:40Z
date_published: 2022-08-03T00:00:00Z
date_updated: 2023-08-04T10:26:40Z
day: '03'
department:
- _id: BjHo
doi: 10.1103/physrevfluids.7.l081301
external_id:
arxiv:
- '2205.12871'
isi:
- '000836397000001'
intvolume: ' 7'
isi: 1
issue: '8'
keyword:
- Fluid Flow and Transfer Processes
- Modeling and Simulation
- Computational Mechanics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.2205.12871'
month: '08'
oa: 1
oa_version: Preprint
publication: Physical Review Fluids
publication_identifier:
issn:
- 2469-990X
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Relaminarization of elastic turbulence
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 7
year: '2022'
...
---
_id: '7534'
abstract:
- lang: eng
text: 'In the past two decades, our understanding of the transition to turbulence
in shear flows with linearly stable laminar solutions has greatly improved. Regarding
the susceptibility of the laminar flow, two concepts have been particularly useful:
the edge states and the minimal seeds. In this nonlinear picture of the transition,
the basin boundary of turbulence is set by the edge state''s stable manifold and
this manifold comes closest in energy to the laminar equilibrium at the minimal
seed. We begin this paper by presenting numerical experiments in which three-dimensional
perturbations are too energetic to trigger turbulence in pipe flow but they do
lead to turbulence when their amplitude is reduced. We show that this seemingly
counterintuitive observation is in fact consistent with the fully nonlinear description
of the transition mediated by the edge state. In order to understand the physical
mechanisms behind this process, we measure the turbulent kinetic energy production
and dissipation rates as a function of the radial coordinate. Our main observation
is that the transition to turbulence relies on the energy amplification away from
the wall, as opposed to the turbulence itself, whose energy is predominantly produced
near the wall. This observation is further supported by the similar analyses on
the minimal seeds and the edge states. Furthermore, we show that the time evolution
of production-over-dissipation curves provides a clear distinction between the
different initial amplification stages of the transition to turbulence from the
minimal seed.'
article_number: '023903'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- 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: Elena
full_name: Marensi, Elena
last_name: Marensi
- first_name: Ashley P.
full_name: Willis, Ashley P.
last_name: Willis
- first_name: Björn
full_name: Hof, Björn
id: 3A374330-F248-11E8-B48F-1D18A9856A87
last_name: Hof
orcid: 0000-0003-2057-2754
citation:
ama: Budanur NB, Marensi E, Willis AP, Hof B. Upper edge of chaos and the energetics
of transition in pipe flow. Physical Review Fluids. 2020;5(2). doi:10.1103/physrevfluids.5.023903
apa: Budanur, N. B., Marensi, E., Willis, A. P., & Hof, B. (2020). Upper edge
of chaos and the energetics of transition in pipe flow. Physical Review Fluids.
American Physical Society. https://doi.org/10.1103/physrevfluids.5.023903
chicago: Budanur, Nazmi B, Elena Marensi, Ashley P. Willis, and Björn Hof. “Upper
Edge of Chaos and the Energetics of Transition in Pipe Flow.” Physical Review
Fluids. American Physical Society, 2020. https://doi.org/10.1103/physrevfluids.5.023903.
ieee: N. B. Budanur, E. Marensi, A. P. Willis, and B. Hof, “Upper edge of chaos
and the energetics of transition in pipe flow,” Physical Review Fluids,
vol. 5, no. 2. American Physical Society, 2020.
ista: Budanur NB, Marensi E, Willis AP, Hof B. 2020. Upper edge of chaos and the
energetics of transition in pipe flow. Physical Review Fluids. 5(2), 023903.
mla: Budanur, Nazmi B., et al. “Upper Edge of Chaos and the Energetics of Transition
in Pipe Flow.” Physical Review Fluids, vol. 5, no. 2, 023903, American
Physical Society, 2020, doi:10.1103/physrevfluids.5.023903.
short: N.B. Budanur, E. Marensi, A.P. Willis, B. Hof, Physical Review Fluids 5 (2020).
date_created: 2020-02-27T10:26:57Z
date_published: 2020-02-21T00:00:00Z
date_updated: 2023-08-18T06:44:46Z
day: '21'
department:
- _id: BjHo
doi: 10.1103/physrevfluids.5.023903
external_id:
arxiv:
- '1912.09270'
isi:
- '000515065100001'
intvolume: ' 5'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1912.09270
month: '02'
oa: 1
oa_version: Preprint
publication: Physical Review Fluids
publication_identifier:
issn:
- 2469-990X
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Upper edge of chaos and the energetics of transition in pipe flow
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 5
year: '2020'
...
---
_id: '9162'
abstract:
- lang: eng
text: Active navigation relies on effectively extracting information from the surrounding
environment, and often features the tracking of gradients of a relevant signal—such
as the concentration of molecules. Microfluidic networks of closed pathways pose
the challenge of determining the shortest exit pathway, which involves the proper
local decision-making at each bifurcating junction. Here, we focus on the basic
decision faced at a T-junction by a microscopic particle, which orients among
possible paths via its sensing of a diffusible substance's concentration. We study
experimentally the navigation of colloidal particles following concentration gradients
by diffusiophoresis. We treat the situation as a mean first passage time (MFPT)
problem that unveils the important role of a separatrix in the concentration field
to determine the statistics of path taking. Further, we use numerical experiments
to study different strategies, including biomimetic ones such as run and tumble
or Markovian chemotactic migration. The discontinuity in the MFPT at the junction
makes it remarkably difficult for microscopic agents to follow the shortest path,
irrespective of adopted navigation strategy. In contrast, increasing the size
of the sensing agents improves the efficiency of short-path taking by harvesting
information on a larger scale. It inspires the development of a run-and-whirl
dynamics that takes advantage of the mathematical properties of harmonic functions
to emulate particles beyond their own size.
article_number: '104202'
article_processing_charge: No
article_type: original
author:
- first_name: Tanvi
full_name: Gandhi, Tanvi
last_name: Gandhi
- first_name: Jinzi
full_name: Mac Huang, Jinzi
last_name: Mac Huang
- first_name: Antoine
full_name: Aubret, Antoine
last_name: Aubret
- first_name: Yaocheng
full_name: Li, Yaocheng
last_name: Li
- first_name: Sophie
full_name: Ramananarivo, Sophie
last_name: Ramananarivo
- first_name: Massimo
full_name: Vergassola, Massimo
last_name: Vergassola
- first_name: Jérémie A
full_name: Palacci, Jérémie A
id: 8fb92548-2b22-11eb-b7c1-a3f0d08d7c7d
last_name: Palacci
orcid: 0000-0002-7253-9465
citation:
ama: Gandhi T, Mac Huang J, Aubret A, et al. Decision-making at a T-junction by
gradient-sensing microscopic agents. Physical Review Fluids. 2020;5(10).
doi:10.1103/physrevfluids.5.104202
apa: Gandhi, T., Mac Huang, J., Aubret, A., Li, Y., Ramananarivo, S., Vergassola,
M., & Palacci, J. A. (2020). Decision-making at a T-junction by gradient-sensing
microscopic agents. Physical Review Fluids. American Physical Society.
https://doi.org/10.1103/physrevfluids.5.104202
chicago: Gandhi, Tanvi, Jinzi Mac Huang, Antoine Aubret, Yaocheng Li, Sophie Ramananarivo,
Massimo Vergassola, and Jérémie A Palacci. “Decision-Making at a T-Junction by
Gradient-Sensing Microscopic Agents.” Physical Review Fluids. American
Physical Society, 2020. https://doi.org/10.1103/physrevfluids.5.104202.
ieee: T. Gandhi et al., “Decision-making at a T-junction by gradient-sensing
microscopic agents,” Physical Review Fluids, vol. 5, no. 10. American Physical
Society, 2020.
ista: Gandhi T, Mac Huang J, Aubret A, Li Y, Ramananarivo S, Vergassola M, Palacci
JA. 2020. Decision-making at a T-junction by gradient-sensing microscopic agents.
Physical Review Fluids. 5(10), 104202.
mla: Gandhi, Tanvi, et al. “Decision-Making at a T-Junction by Gradient-Sensing
Microscopic Agents.” Physical Review Fluids, vol. 5, no. 10, 104202, American
Physical Society, 2020, doi:10.1103/physrevfluids.5.104202.
short: T. Gandhi, J. Mac Huang, A. Aubret, Y. Li, S. Ramananarivo, M. Vergassola,
J.A. Palacci, Physical Review Fluids 5 (2020).
date_created: 2021-02-18T14:07:16Z
date_published: 2020-10-14T00:00:00Z
date_updated: 2023-02-23T13:50:55Z
day: '14'
ddc:
- '530'
doi: 10.1103/physrevfluids.5.104202
extern: '1'
file:
- access_level: open_access
checksum: dfecfadbd79fd760fb4db20d1e667f17
content_type: application/pdf
creator: cziletti
date_created: 2021-02-18T14:12:24Z
date_updated: 2021-02-18T14:12:24Z
file_id: '9163'
file_name: 2020_PhysRevFluids_Gandhi.pdf
file_size: 730504
relation: main_file
success: 1
file_date_updated: 2021-02-18T14:12:24Z
has_accepted_license: '1'
intvolume: ' 5'
issue: '10'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
publication: Physical Review Fluids
publication_identifier:
issn:
- 2469-990X
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Decision-making at a T-junction by gradient-sensing microscopic agents
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: D865714E-FA4E-11E9-B85B-F5C5E5697425
volume: 5
year: '2020'
...