A Lattice Boltzmann Method for Simulating the Separation of Red Blood Cells at Microvascular Bifurcations  

作　　者：SHEN Zai-Yi HE Ying 沈在意;贺缨(Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026)

机构地区：[1]Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026

出　　处：《Chinese Physics Letters》2012年第2期130-133,共4页中国物理快报（英文版）

基　　金：Partially supported by the Anhui Provincial Natural Science Foundation under Grant No 11040606M09.

摘　　要：A computational simulation for the separation of red blood cells (RBCs) is presented.The deformability of RBCs is expressed by the spring network model,which is based on the minimum energy principle.In the computation of the fluid flow,the lattice Boltzmann method is used to solve the Navier-Stokes equations.Coupling of the fluid-membrane interaction is carried out by using the immersed boundary method.To verify our method,the motions of RBCs in shear flow are simulated.Typical motions of RBCs observed in the experiments are reproduced,including tank-treading,swinging and tumbling.The motions of 8 RBCs at the bifurcation are simulated when the two daughter vessels have different ratios.The results indicate that when the ratio of the daughter vessel diameter becomes smaller,the distribution of RBCs in the two vessels becomes more non-uniform.

关 键 词：method BIFURCATION BIFURCATION 

分 类 号：O17[理学—数学]