Giant vortex dynamics in confined bacterial turbulence

Article Physics, Multidisciplinary

Ising-like Critical Behavior of Vortex Lattices in an Active Fluid

Henning Reinken et al.

Summary: Turbulent vortex structures in bacterial active fluids can form regular vortex lattices under weak geometrical constraints, exhibiting features of a continuous second-order equilibrium phase transition.

PHYSICAL REVIEW LETTERS (2022)

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Review Physics, Condensed Matter

Active Turbulence

Ricard Alert et al.

Summary: Active fluids, such as bacterial suspensions and sperm cells, exhibit complex spatiotemporal flows reminiscent of inertial turbulence. This phenomenon, known as active turbulence, is characterized by power-law scaling and the absence of energy cascades. The emergence of power-law scaling and the self-organized nature of energy injection distinguish active turbulence from inertial turbulence.

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS (2022)

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Article Physics, Fluids & Plasmas

Lagrangian manifestation of anomalies in active turbulence

Rahul K. Singh et al.

Summary: This study reveals that Lagrangian measurements in active turbulence exhibit the characteristics of turbulent and anomalous streaky hydrodynamics, leading to a self-selection of persistent trajectories- Levy walks- over diffusive ones. This emergent dynamical heterogeneity results in a super-diffusive first passage distribution, which could potentially benefit biological motility. Furthermore, the study demonstrates that active flows differ from inertial turbulence in the pair-dispersion problem.

PHYSICAL REVIEW FLUIDS (2022)

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Article Physics, Fluids & Plasmas

Effective temperature and Einstein relation for particles in active matter flows

C. P. Sanjay et al.

Summary: This paper investigates the effective temperature of interacting particles in active matter systems. The authors propose an exact expression of the effective temperature for particles in a dense bacterial suspension and observe that it is linearly related to particle diffusivity, with the slope defining particle mobility.

PHYSICAL REVIEW E (2022)

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Article Multidisciplinary Sciences

Anomalous collapses of Nares Strait ice arches leads to enhanced export of Arctic sea ice

G. W. K. Moore et al.

Summary: Ice arches at the northern and southern ends of Nares Strait, a key passage in the Arctic, are forming for shorter durations, leading to increased ice transport and accelerating the export of multi-year ice.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Viscoelastic control of spatiotemporal order in bacterial active matter

Song Liu et al.

Summary: Active matter is composed of units that generate mechanical work by consuming energy, such as living systems and biopolymers. The goal is to understand and control the self-organization in space and time. Most active systems exhibit spatial order or temporal synchronization, while simultaneous control of spatial and temporal organization requires complex interactions.

NATURE (2021)

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Article Physics, Multidisciplinary

Motility-induced clustering and meso-scale turbulence in active polar fluids

Vasco M. Worlitzer et al.

Summary: Recent studies on active polar fluids have revealed interesting aspects such as anomalous velocity statistics and clustering phenomena, which cannot be explained by current models. By extending the continuum model, researchers found a long-wavelength instability in addition to the short-wavelength instability, leading to novel dynamics and phenomena related to nucleation and coarsening processes. The interplay between short-range and long-range instabilities results in rich patterns with changing irregularly shaped boundaries, offering a simple explanation for anomalous velocity statistics observed in recent experiments.

NEW JOURNAL OF PHYSICS (2021)

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Article Physics, Multidisciplinary

Activity-induced isotropic-polar transition in active liquid crystals

M. G. Giordano et al.

Summary: Active fluids are non-equilibrium systems with internal energy injection from active constituents. A transition from motionless isotropic state to flowing polar state can occur solely through active injection driven by polar-hydrodynamic interactions in absence of a free energy favoring ordered phase development. Elastic absorption plays a significant role in energy transfer dynamics, contrary to traditional active gel theory where this term is negligibly small.

EPL (2021)

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Article Physics, Multidisciplinary

Anomalous Diffusion and Levy Walks Distinguish Active from Inertial Turbulence

Siddhartha Mukherjee et al.

Summary: Using a hydrodynamic model, this study demonstrates the superdiffusion of dense bacterial swarms through Levy walks, appearing as a transition from ballistic to diffusive scaling in the measurements of mean-squared displacements, and associated with the emergence of oscillatory streaks in the flow. The research lays the theoretical groundwork for an advantageous strategy in the collective behavior of microorganisms, while emphasizing the essential differences between active and inertial turbulence.

PHYSICAL REVIEW LETTERS (2021)

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Article Chemistry, Physical

Turbulence-induced clustering in compressible active fluids

Vasco M. Worlitzer et al.

Summary: A novel phase of active polar fluids characterized by continuous creation and destruction of dense clusters due to self-sustained turbulence is studied. This state arises from the interplay between self-advection of aligned swimmers and their defect topology, with typical cluster size determined by characteristic vortex size. Results are obtained by investigating a continuum model of compressible polar active fluids, incorporating typical experimental observations in bacterial suspensions with a non-monotone speed-density dependence.

SOFT MATTER (2021)

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Article Chemistry, Physical

Density fluctuations and energy spectra of 3D bacterial suspensions

Zhengyang Liu et al.

Summary: This study investigates density fluctuations in three-dimensional wet active fluids and demonstrates the existence of giant number fluctuations in low-concentration bacterial suspensions. The anomalous scaling is shown to persist well before the transition to active turbulence, challenging the common view of dense bacterial suspensions as active polar fluids.

SOFT MATTER (2021)

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Article Physics, Fluids & Plasmas

Multiscale control of active emulsion dynamics

Livio Nicola Carenza et al.

PHYSICAL REVIEW FLUIDS (2020)

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Article Physics, Multidisciplinary

Organizing bacterial vortex lattices by periodic obstacle arrays

Henning Reinken et al.

COMMUNICATIONS PHYSICS (2020)

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Review Physics, Applied

Computational models for active matter

M. Reza Shaebani et al.

NATURE REVIEWS PHYSICS (2020)

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Article Physics, Multidisciplinary

Coherent motion of dense active matter

Amin Doostmohammadi et al.

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS (2019)

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Article Multidisciplinary Sciences

Self-organized dynamics and the transition to turbulence of confined active nematics

Achini Opathalage et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2019)

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Article Physics, Multidisciplinary

Phase Transition to Large Scale Coherent Structures in Two-Dimensional Active Matter Turbulence

Moritz Linkmann et al.

PHYSICAL REVIEW LETTERS (2019)

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Article Physics, Condensed Matter

Self-Propelled Rods: Insights and Perspectives for Active Matter

Markus Bär et al.

Annual Review of Condensed Matter Physics (2019)

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Article Chemistry, Physical

Vortex dynamics and Lagrangian statistics in a model for active turbulence

Martin James et al.

EUROPEAN PHYSICAL JOURNAL E (2018)

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Article Multidisciplinary Sciences

Structural absorption by barbule microstructures of super black bird of paradise feathers

Dakota E. McCoy et al.

NATURE COMMUNICATIONS (2018)

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Article Physics, Fluids & Plasmas

Collective dynamics of two-dimensional swimming bacteria: Experiments and models

Gil Ariel et al.

PHYSICAL REVIEW E (2018)

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Article Physics, Fluids & Plasmas

Derivation of a hydrodynamic theory for mesoscale dynamics in microswimmer suspensions

Henning Reinken et al.

PHYSICAL REVIEW E (2018)

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Article Multidisciplinary Sciences

ACTIVE MATTER Transition from turbulent to coherent flows in confined three-dimensional active fluids

Kun-Ta Wu et al.

SCIENCE (2017)

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Article Chemistry, Physical

Geometry-driven collective ordering of bacterial vortices

Kazusa Beppu et al.

SOFT MATTER (2017)

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Article Chemistry, Physical

Geometric control of active collective motion

Maxime Theillard et al.

SOFT MATTER (2017)

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Article Physics, Fluids & Plasmas

Long-range nematic order and anomalous fluctuations in suspensions of swimming filamentous bacteria

Daiki Nishiguchi et al.

PHYSICAL REVIEW E (2017)

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Article Chemistry, Physical

Spontaneous flow in polar active fluids: the effect of a phenomenological self propulsion-like term

Francesco Bonelli et al.

EUROPEAN PHYSICAL JOURNAL E (2016)

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Article Physics, Multidisciplinary

Directed collective motion of bacteria under channel confinement

H. Wioland et al.

NEW JOURNAL OF PHYSICS (2016)

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Article Physics, Fluids & Plasmas

Hydrodynamic length-scale selection in microswimmer suspensions

Sebastian Heidenreich et al.

PHYSICAL REVIEW E (2016)

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Article Physics, Multidisciplinary

Generalized Navier-Stokes equations for active suspensions

J. Slomka et al.

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS (2015)

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Article Physics, Fluids & Plasmas

Turbulence of swarming sperm

Adama Creppy et al.

PHYSICAL REVIEW E (2015)

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Article Physics, Multidisciplinary

Fast-Moving Bacteria Self-Organize into Active Two-Dimensional Crystals of Rotating Cells

Alexander P. Petroff et al.

PHYSICAL REVIEW LETTERS (2015)

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Article Multidisciplinary Sciences

New class of turbulence in active fluids

Vasil Bratanov et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2015)

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Article Multidisciplinary Sciences

Swarming bacteria migrate by Levy Walk

Gil Ariel et al.

NATURE COMMUNICATIONS (2015)

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Article Multidisciplinary Sciences

Living liquid crystals

Shuang Zhou et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2014)

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Article Multidisciplinary Sciences

Fluid flows created by swimming bacteria drive self-organization in confined suspensions

Enkeleida Lushi et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2014)

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Article Chemistry, Physical

Enhanced diffusion of tracer particles in dilute bacterial suspensions

Alexander Morozov et al.

SOFT MATTER (2014)

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Article Physics, Multidisciplinary

Minimal continuum theories of structure formation in dense active fluids

Joern Dunkel et al.

NEW JOURNAL OF PHYSICS (2013)

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Article Physics, Multidisciplinary

Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex

Hugo Wioland et al.

PHYSICAL REVIEW LETTERS (2013)

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Article Physics, Multidisciplinary

Fluid Dynamics of Bacterial Turbulence

Joern Dunkel et al.

PHYSICAL REVIEW LETTERS (2013)

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Article Physics, Multidisciplinary

Hydrodynamics of soft active matter

M. C. Marchetti et al.

REVIEWS OF MODERN PHYSICS (2013)

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Article Physics, Multidisciplinary

Nonlinear Field Equations for Aligning Self-Propelled Rods

Anton Peshkov et al.

PHYSICAL REVIEW LETTERS (2012)

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Article Physics, Multidisciplinary

Collective Motion and Nonequilibrium Cluster Formation in Colonies of Gliding Bacteria

Fernando Peruani et al.

PHYSICAL REVIEW LETTERS (2012)

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Article Physics, Multidisciplinary

Physical Properties of Collective Motion in Suspensions of Bacteria

Andrey Sokolov et al.

PHYSICAL REVIEW LETTERS (2012)

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Article Multidisciplinary Sciences

Meso-scale turbulence in living fluids

Henricus H. Wensink et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2012)

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Review Physics, Condensed Matter

The Mechanics and Statistics of Active Matter

Sriram Ramaswamy

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 1 (2010)

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Article Physics, Fluids & Plasmas

Enhanced mixing and spatial instability in concentrated bacterial suspensions

Andrey Sokolov et al.

PHYSICAL REVIEW E (2009)

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Article Multidisciplinary Sciences

Statistical mechanics and hydrodynamics of bacterial suspensions

Aparna Baskaran et al.

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA (2009)

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Article Physics, Multidisciplinary

Instabilities and pattern formation in active particle suspensions: Kinetic theory and continuum simulations

David Saintillan et al.

PHYSICAL REVIEW LETTERS (2008)

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Article Physics, Multidisciplinary

Concentration dependence of the collective dynamics of swimming bacteria

Andrey Sokolov et al.

PHYSICAL REVIEW LETTERS (2007)

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Review Physics, Multidisciplinary

Hydrodynamics and phases of flocks

J Toner et al.

ANNALS OF PHYSICS (2005)

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Article Physics, Multidisciplinary

Self-concentration and large-scale coherence in bacterial dynamics

C Dombrowski et al.

PHYSICAL REVIEW LETTERS (2004)

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Article Physics, Multidisciplinary

Hydrodynamic fluctuations and instabilities in ordered suspensions of self-propelled particles

RA Simha et al.

PHYSICAL REVIEW LETTERS (2002)

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Giant vortex dynamics in confined bacterial turbulence

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