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

The European Physical Journal. E, Soft Matter
Francesco BonelliD Marenduzzo

Abstract

We present hybrid lattice Boltzmann simulations of extensile and contractile active fluids where we incorporate phenomenologically the tendency of active particles such as cell and bacteria, to move, or swim, along the local orientation. Quite surprisingly, we show that the interplay between alignment and activity can lead to completely different results, according to geometry (periodic boundary conditions or confinement between flat walls) and nature of the activity (extensile or contractile). An interesting generic outcome is that the alignment interaction can transform stationary active patterns into continuously moving ones: the dynamics of these evolving patterns can be oscillatory or chaotic according to the strength of the alignment term. Our results suggest that flow-polarisation alignment can have important consequences on the collective dynamics of active fluids and active gel.

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Citations

May 28, 2016·The European Physical Journal. E, Soft Matter·Alessandra S LanotteLuca Biferale
Nov 11, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Markus WilczekSvetlana V Gurevich
Jan 19, 2019·Journal of Physics D: Applied Physics·Patricia BassereauThomas R Weikl
Aug 4, 2020·The European Physical Journal. E, Soft Matter·Joshua WaltonNigel J Mottram
Jan 4, 2019·Proceedings. Mathematical, Physical, and Engineering Sciences·G KitavtsevB Wagner
Jun 30, 2019·The European Physical Journal. E, Soft Matter·Livio Nicola CarenzaAdriano Tiribocchi

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