Work

Role of interfacial friction for flow instabilities in a thin polar-ordered active fluid layer

Year: 2015

Type: article

Abstract: We construct a generic coarse-grained dynamics of a thin inflexible planar layer of polar-ordered suspension of active particles that is frictionally coupled to an embedding isotropic passive fluid medium with a friction coefficient Γ. Being controlled by Γ, our model provides a unified framework to describe the long-wavelength behavior of a variety of thin polar-ordered systems, ranging from wet to dry active matter and free-standing active films. Investigations of the linear instabilities around a chosen orientationally ordered uniform reference state reveal generic moving and static instabilities in the system that can depend sensitively on Γ. Based on our results, we discuss estimation of bounds on Γ in experimentally accessible systems.

Source: Physical Review E

DOI: 10.1103/physreve.92.052306

Authors: Niladri Sarkar, Abhik Basu

Institutions: Saha Institute of Nuclear Physics, Max Planck Institute for the Physics of Complex Systems

Language: English

Topic: Micro and Nano Robotics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Max-Planck-Gesellschaft, Department of Science and Technology, Government of Kerala

OpenAlex ID: W1940001719

FWCI: 0.413

Cites: 46

Cited by: 6

Related to: 10