Rheology of Active-particle Suspensions

Overview

Journal Phys Rev Lett

Publisher American Physical Society

Specialty Biophysics

Date 2004 Apr 20

PMID 15089176

Citations 57

Authors

Yashodhan Hatwalne

Sriram Ramaswamy

Madan Rao

R Aditi Simha

Affiliations

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Abstract

We study the interplay of activity, order, and flow through a set of coarse-grained equations governing the hydrodynamic velocity, concentration, and stress fields in a suspension of active, energy-dissipating particles. We make several predictions for the rheology of such systems, which can be tested on bacterial suspensions, cell extracts with motors and filaments, or artificial machines in a fluid. The phenomena of cytoplasmic streaming, elastotaxis, and active mechanosensing find natural explanations within our model.

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