---
_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.
    <i>Physical Review Fluids</i>. 2023;8(6). doi:<a href="https://doi.org/10.1103/physrevfluids.8.063101">10.1103/physrevfluids.8.063101</a>
  apa: Andersen, B. H., Renaud, J. B., Rønning, J., Angheluta, L., &#38; Doostmohammadi,
    A. (2023). Symmetry-restoring crossover from defect-free to defect-laden turbulence
    in polar active matter. <i>Physical Review Fluids</i>. American Physical Society.
    <a href="https://doi.org/10.1103/physrevfluids.8.063101">https://doi.org/10.1103/physrevfluids.8.063101</a>
  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.” <i>Physical Review Fluids</i>. American Physical
    Society, 2023. <a href="https://doi.org/10.1103/physrevfluids.8.063101">https://doi.org/10.1103/physrevfluids.8.063101</a>.
  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,” <i>Physical Review Fluids</i>, 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.” <i>Physical Review Fluids</i>,
    vol. 8, no. 6, 063101, American Physical Society, 2023, doi:<a href="https://doi.org/10.1103/physrevfluids.8.063101">10.1103/physrevfluids.8.063101</a>.
  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: '12146'
abstract:
- lang: eng
  text: 'In this paper, we explore the stability and dynamical relevance of a wide
    variety of steady, time-periodic, quasiperiodic, and chaotic flows arising between
    orthogonally stretching parallel plates. We first explore the stability of all
    the steady flow solution families formerly identified by Ayats et al. [“Flows
    between orthogonally stretching parallel plates,” Phys. Fluids 33, 024103 (2021)],
    concluding that only the one that originates from the Stokesian approximation
    is actually stable. When both plates are shrinking at identical or nearly the
    same deceleration rates, this Stokesian flow exhibits a Hopf bifurcation that
    leads to stable time-periodic regimes. The resulting time-periodic orbits or flows
    are tracked for different Reynolds numbers and stretching rates while monitoring
    their Floquet exponents to identify secondary instabilities. It is found that
    these time-periodic flows also exhibit Neimark–Sacker bifurcations, generating
    stable quasiperiodic flows (tori) that may sometimes give rise to chaotic dynamics
    through a Ruelle–Takens–Newhouse scenario. However, chaotic dynamics is unusually
    observed, as the quasiperiodic flows generally become phase-locked through a resonance
    mechanism before a strange attractor may arise, thus restoring the time-periodicity
    of the flow. In this work, we have identified and tracked four different resonance
    regions, also known as Arnold tongues or horns. In particular, the 1 : 4 strong
    resonance region is explored in great detail, where the identified scenarios are
    in very good agreement with normal form theory. '
acknowledgement: "This work was supported by the Spanish MINECO under Grant Nos. FIS2017-85794-P
  and PRX18/00179, the Spanish MICINN through Grant No. PID2020-114043GB-I00, and
  the\r\nGeneralitat de Catalunya under Grant No. 2017-SGR-785. B.W.’s research was
  also supported by the Chinese Scholarship Council through Grant CSC No. 201806440152."
article_number: '114111'
article_processing_charge: No
article_type: original
author:
- first_name: B.
  full_name: Wang, B.
  last_name: Wang
- first_name: Roger
  full_name: Ayats López, Roger
  id: ab77522d-073b-11ed-8aff-e71b39258362
  last_name: Ayats López
  orcid: 0000-0001-6572-0621
- first_name: A.
  full_name: Meseguer, A.
  last_name: Meseguer
- first_name: F.
  full_name: Marques, F.
  last_name: Marques
citation:
  ama: Wang B, Ayats López R, Meseguer A, Marques F. Phase-locking flows between orthogonally
    stretching parallel plates. <i>Physics of Fluids</i>. 2022;34(11). doi:<a href="https://doi.org/10.1063/5.0124152">10.1063/5.0124152</a>
  apa: Wang, B., Ayats López, R., Meseguer, A., &#38; Marques, F. (2022). Phase-locking
    flows between orthogonally stretching parallel plates. <i>Physics of Fluids</i>.
    AIP Publishing. <a href="https://doi.org/10.1063/5.0124152">https://doi.org/10.1063/5.0124152</a>
  chicago: Wang, B., Roger Ayats López, A. Meseguer, and F. Marques. “Phase-Locking
    Flows between Orthogonally Stretching Parallel Plates.” <i>Physics of Fluids</i>.
    AIP Publishing, 2022. <a href="https://doi.org/10.1063/5.0124152">https://doi.org/10.1063/5.0124152</a>.
  ieee: B. Wang, R. Ayats López, A. Meseguer, and F. Marques, “Phase-locking flows
    between orthogonally stretching parallel plates,” <i>Physics of Fluids</i>, vol.
    34, no. 11. AIP Publishing, 2022.
  ista: Wang B, Ayats López R, Meseguer A, Marques F. 2022. Phase-locking flows between
    orthogonally stretching parallel plates. Physics of Fluids. 34(11), 114111.
  mla: Wang, B., et al. “Phase-Locking Flows between Orthogonally Stretching Parallel
    Plates.” <i>Physics of Fluids</i>, vol. 34, no. 11, 114111, AIP Publishing, 2022,
    doi:<a href="https://doi.org/10.1063/5.0124152">10.1063/5.0124152</a>.
  short: B. Wang, R. Ayats López, A. Meseguer, F. Marques, Physics of Fluids 34 (2022).
date_created: 2023-01-12T12:06:58Z
date_published: 2022-11-04T00:00:00Z
date_updated: 2023-10-03T11:07:58Z
day: '04'
department:
- _id: BjHo
doi: 10.1063/5.0124152
external_id:
  isi:
  - '000880665300024'
intvolume: '        34'
isi: 1
issue: '11'
keyword:
- Condensed Matter Physics
- Fluid Flow and Transfer Processes
- Mechanics of Materials
- Computational Mechanics
- Mechanical Engineering
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://upcommons.upc.edu/handle/2117/385635
month: '11'
oa: 1
oa_version: Submitted Version
publication: Physics of Fluids
publication_identifier:
  eissn:
  - 1089-7666
  issn:
  - 1070-6631
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Phase-locking flows between orthogonally stretching parallel plates
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 34
year: '2022'
...
---
_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.
    <i>Physical Review Fluids</i>. 2022;7(8). doi:<a href="https://doi.org/10.1103/physrevfluids.7.l081301">10.1103/physrevfluids.7.l081301</a>
  apa: Kumar, M. V., Varshney, A., Li, D., &#38; Steinberg, V. (2022). Relaminarization
    of elastic turbulence. <i>Physical Review Fluids</i>. American Physical Society.
    <a href="https://doi.org/10.1103/physrevfluids.7.l081301">https://doi.org/10.1103/physrevfluids.7.l081301</a>
  chicago: Kumar, M. Vijay, Atul Varshney, Dongyang Li, and Victor Steinberg. “Relaminarization
    of Elastic Turbulence.” <i>Physical Review Fluids</i>. American Physical Society,
    2022. <a href="https://doi.org/10.1103/physrevfluids.7.l081301">https://doi.org/10.1103/physrevfluids.7.l081301</a>.
  ieee: M. V. Kumar, A. Varshney, D. Li, and V. Steinberg, “Relaminarization of elastic
    turbulence,” <i>Physical Review Fluids</i>, 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.” <i>Physical
    Review Fluids</i>, vol. 7, no. 8, L081301, American Physical Society, 2022, doi:<a
    href="https://doi.org/10.1103/physrevfluids.7.l081301">10.1103/physrevfluids.7.l081301</a>.
  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'
...