ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Hydrodynamic Fluctuations and Instabilities in Ordered Suspensions of Self-Propelled Particles

Simha, Aditi R and Ramaswamy, Sriram (2002) Hydrodynamic Fluctuations and Instabilities in Ordered Suspensions of Self-Propelled Particles. In: Physical Review Letters, 89 (5). 058101/1-4.

[img]
Preview
PDF
Hydrodynamic_Fluctuations.pdf

Download (4Mb)

Abstract

We construct the hydrodynamic equations for suspensions of self-propelled particles (SPPs) with spontaneous orientational order, and make a number of striking, testable predictions: (i) Nematic SPP suspensions are always absolutely unstable at long wavelengths. (ii) SPP suspensions support novel propagating modes at long wavelengths, coupling orientation, flow, and concentration. (iii) In a wave number regime accessible only in low Reynolds number systems such as bacteria, polar-ordered suspensions are invariably convectively unstable. (iv) The variance in the number N of particles, divided by the mean <N>, diverges as <N>2/3 in polar-ordered SPP suspensions.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to American Physical Society (APS).
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 10 Nov 2004
Last Modified: 19 Sep 2010 04:17
URI: http://eprints.iisc.ernet.in/id/eprint/2301

Actions (login required)

View Item View Item