Active turbulence

R Alert, J Casademunt, JF Joanny - Annual Review of …, 2022 - annualreviews.org
Active fluids exhibit spontaneous flows with complex spatiotemporal structure, which have
been observed in bacterial suspensions, sperm cells, cytoskeletal suspensions, self …

Autonomous materials systems from active liquid crystals

R Zhang, A Mozaffari, JJ de Pablo - Nature Reviews Materials, 2021 - nature.com
Liquid crystals (LCs) are ubiquitous in display technologies. The orientational ordering in the
nematic phase of LCs gives rise to structural anisotropy, the ability to form topological …

Universal scaling of active nematic turbulence

R Alert, JF Joanny, J Casademunt - Nature Physics, 2020 - nature.com
A landmark of turbulence is the emergence of universal scaling laws, such as Kolmogorov's
E (q)~ q− 5∕ 3 scaling of the kinetic energy spectrum of inertial turbulence with the …

Hydrodynamics of active defects: From order to chaos to defect ordering

S Shankar, MC Marchetti - Physical Review X, 2019 - APS
Topological defects play a prominent role in the physics of two-dimensional materials. When
driven out of equilibrium in active nematics, disclinations can acquire spontaneous self …

Scaling regimes of active turbulence with external dissipation

B Martínez-Prat, R Alert, F Meng, J Ignés-Mullol… - Physical Review X, 2021 - APS
Active fluids exhibit complex turbulentlike flows at low Reynolds number. Recent work
predicted that 2D active nematic turbulence follows scaling laws with universal exponents …

Submersed micropatterned structures control active nematic flow, topology, and concentration

K Thijssen, DA Khaladj, SA Aghvami… - Proceedings of the …, 2021 - National Acad Sciences
Coupling between flows and material properties imbues rheological matter with its wide-
ranging applicability, hence the excitement for harnessing the rheology of active fluids for …

Probing active nematics with in situ microfabricated elastic inclusions

I Vélez-Cerón, P Guillamat, F Sagués… - Proceedings of the …, 2024 - National Acad Sciences
In this work, we report a direct measurement of the forces exerted by a tubulin/kinesin active
nematic gel as well as its complete rheological characterization, including the quantification …

Run-and-tumble motion in a harmonic potential: field theory and entropy production

R Garcia-Millan, G Pruessner - Journal of Statistical Mechanics …, 2021 - iopscience.iop.org
Abstract Run-and-tumble (RnT) motion is an example of active motility where particles move
at constant speed and change direction at random times. In this work we study RnT motion …

Confinement controls the bend instability of three-dimensional active liquid crystals

P Chandrakar, M Varghese, SA Aghvami, A Baskaran… - Physical review …, 2020 - APS
Spontaneous growth of long-wavelength deformations is a defining feature of active liquid
crystals. We investigate the effect of confinement on the instability of 3D active liquid crystals …

[HTML][HTML] Magnetically controlled bacterial turbulence

K Beppu, JVI Timonen - Communications Physics, 2024 - nature.com
Concentrated active agents can exhibit turbulent-like flows reminiscent of hydrodynamic
turbulence. Despite its importance, the influence of external fields on active turbulence …