Rheology of active-particle suspensions

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 test...

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Bibliographic Details
Published in:Physical review letters 2004-03, Vol.92 (11), p.118101.1-118101.4, Article 118101
Main Authors: HATWALNE, Yashodhan, RAMASWAMY, Sriram, RAO, Madan, ADITI SIMHA, R
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Cytoplasmic Streaming
Exact sciences and technology
General and physical chemistry
Models, Biological
Models, Theoretical
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Rheology - methods
Suspensions
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.92.118101