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Response and Recovery Times of Elastic and Viscoelastic Capsules in Shear Flow

Published online by Cambridge University Press:  03 June 2015

John Gounley  and
Yan Peng
John Gounley
Affiliation:
Department of Mathematics and Statistics, Old Dominion University, Norfolk, VA 23507, USA
Yan Peng*
Affiliation:
Department of Mathematics and Statistics, Old Dominion University, Norfolk, VA 23507, USA
*
*Corresponding author. Email addresses: [email protected] (J. Gounley), [email protected] (Y. Peng)
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Abstract

Amid the recent interest in the role of membrane viscosity in the deformation of a fluid-filled capsule, we consider the role of various capsule properties (shear elasticity, membrane bending stiffness and viscosity) in determining the response and recovery times of a spherical capsule in shear flow. These times are determined by fitting exponential functions to results for the Taylor deformation parameter Dxy. We focus on the relationship between the membrane and fluid viscosity ratios, as suggested by Diaz et al, and whether adjustments to the fluid viscosity ratio may be used to approximate the effects of membrane viscosity. Based on its ability to reproduce response and recovery times, our results suggest that such an approach holds promise.

Keywords

74F10Elastic capsuleviscoelastic capsuleresponse timerecovery timeshear flow
Type
Research Article
Information
Communications in Computational Physics , Volume 17 , Issue 5 , May 2015 , pp. 1151 - 1168
Copyright
Copyright © Global-Science Press 2015 

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