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arXiv · 1909.03132

A mechanism for anomalous transport in chiral active liquids

Zhenghan Liao·Ming Han·Michel Fruchart·Vincenzo Vitelli·Suriyanarayanan Vaikuntanathan
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Abstract

Chiral active fluids are known to have anomalous transport properties such as the so-called odd viscosity. In this paper, we provide a microscopic mechanism for how such anomalous transport coefficients can emerge. We construct an Irving-Kirkwood-type stress tensor for chiral liquids and express the transport coefficients in terms of orientation-averaged intermolecular forces and distortions of the pair correlation function induced by a flow field. We then show how anomalous transport properties can be expected naturally due to the presence of a transverse component in the orientation-averaged intermolecular forces and anomalous distortion modes of the pair correlation function between chiral active particles. We anticipate that our work can provide a microscopic framework to explain the transport properties of non-equilibrium chiral systems.

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Zhenghan Liao, Ming Han, Michel Fruchart, Vincenzo Vitelli, Suriyanarayanan Vaikuntanathan. 2019-09-06. A mechanism for anomalous transport in chiral active liquids. https://doi.org/10.1063/1.5126962

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