Issue
EPL
Volume 81, Number 5, March 2008
Article Number 54002
Number of page(s) 5
Section Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
DOI http://dx.doi.org/10.1209/0295-5075/81/54002
Published online 04 February 2008
EPL, 81 (2008) 54002
DOI: 10.1209/0295-5075/81/54002

Shape changes and motion of a vesicle in a fluid using a lattice Boltzmann model

H. B. Li1, 2, H. H. Yi1, 3, X. W. Shan4 and H. P. Fang1

1  Shanghai Institute of Applied Physics, Chinese Academy of Sciences - P.O. Box 800-204, Shanghai 201800, China
2  Department of information material science and engineering, Guilin University of Electronic Technology Guilin 541004, China
3  Graduate School of the Chinese Academy of Sciences - Beijing 100080, China
4  EXA Corporation - 3 Burlington Woods Drive, Burlington, MA 01803, USA

hbli@guet.edu.cn
fanghaiping@sinap.ac.cn

received 22 August 2007; accepted in final form 8 January 2008; published March 2008
published online 4 February 2008

Abstract
To study erythrocyte deformation and movement in fluid flows, the membrane bending rigidity and elastic modulus are incorporated with a lattice Boltzmann simulation. The stable static biconcave shape is found to resist pathological membrane changes, and the erythrocyte exhibits tank tread-like motion with a highly flattened shape in a shear flow. With intrinsically parallel dynamics, this lattice Boltzmann method may apply to both single and multi-vesicle suspension and complex open membranes in various fluid flows for a wide range of Reynolds numbers.

PACS
47.11.-j - Computational methods in fluid dynamics.
82.70.-y - Disperse systems; complex fluids.
47.10.-g - General theory in fluid dynamics.

© EPLA 2008