Brownian dynamics simulation of two confined colloidal particles  

作　　者：何冬慧 杨涛 李卫华 张磬兰 马红孺 

机构地区：[1]School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China [2]Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240, China [3]Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada [4]School of Physics and Electrical Information Science, Ningxia University, Yinchuan 750021, China

出　　处：《Chinese Physics B》2007年第10期3138-3145,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 10174041 and 10334020）.

摘　　要：The dynamics of two confined colloidal particles is studied by means of Brownian dynamics simulation. The autocorrelation function and cross-correlation function of the two colloidal spheres are computed by utilizing the formulae of hydrodynamic diffusion matrix expanded to different orders, as well as the accurate tensor through numerical algorithm. Furthermore, the numerical results are compared with the experimental results and the theoretical approximation. It is found that the relatively simple theoretical approximation gives good predictions when two spheres are far away from each other, but fails when the two spheres are very close.The dynamics of two confined colloidal particles is studied by means of Brownian dynamics simulation. The autocorrelation function and cross-correlation function of the two colloidal spheres are computed by utilizing the formulae of hydrodynamic diffusion matrix expanded to different orders, as well as the accurate tensor through numerical algorithm. Furthermore, the numerical results are compared with the experimental results and the theoretical approximation. It is found that the relatively simple theoretical approximation gives good predictions when two spheres are far away from each other, but fails when the two spheres are very close.

关 键 词：Brownian dynamics simulation hydrodynamics interaction Oseen tensor Rotne-Prager tensor 

分 类 号：O35[理学—流体力学]