Issue 46, 2021

Turbulence-induced clustering in compressible active fluids


We study a novel phase of active polar fluids, which is characterized by the continuous creation and destruction of dense clusters due to self-sustained turbulence. This state arises due to the interplay between self-advection of the aligned swimmers and their defect topology. The typical cluster size is determined by the characteristic vortex size. Our results are obtained by investigating a continuum model of compressible polar active fluids, which incorporates typical experimental observations in bacterial suspensions, in particular a non-monotone dependence of speed on density.

Graphical abstract: Turbulence-induced clustering in compressible active fluids

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Article information

Article type
03 Sep 2021
12 Oct 2021
First published
11 Nov 2021
This article is Open Access
Creative Commons BY license

Soft Matter, 2021,17, 10447-10457

Turbulence-induced clustering in compressible active fluids

V. M. Worlitzer, G. Ariel, A. Be'er, H. Stark, M. Bär and S. Heidenreich, Soft Matter, 2021, 17, 10447 DOI: 10.1039/D1SM01276B

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