Flow states and transitions of an active nematic in a three dimensional channel
Soft Condensed Matter
2020-10-07 v1
Abstract
We use active nematohydrodynamics to study the flow of an active fluid in a 3D microchannel, finding a transition between active turbulence and regimes where there is a net flow along the channel. We show that the net flow is only possible if the active nematic is flow aligning and that - in agreement with experiments - the appearance of the net flow depends on the aspect ratio of the channel cross-section. We explain our results in terms of the when hydrodynamic screening due to the channel walls allows the emergence of vortex rolls across the channel.
Cite
@article{arxiv.2007.05263,
title = {Flow states and transitions of an active nematic in a three dimensional channel},
author = {Santhan Chandragiri and Amin Doostmohammadi and Julia M. Yeomans and Sumesh P. Thampi},
journal= {arXiv preprint arXiv:2007.05263},
year = {2020}
}