Brownian dynamics simulation of two confined colloidal particles
He Dong-Hui(何冬慧)a)†,Yang Tao(杨涛)b), Li Wei-Hua(李卫华)c), Zhang Qing-Lan(张磬兰)d), and Ma Hong-Ru(马红孺)b)
a School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China; b Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240, China; c Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada; d School of Physics and Electrical Information Science, Ningxia University, Yinchuan 750021, China
Abstract 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.
Received: 24 December 2006
Revised: 12 April 2007
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 10174041 and
10334020).
Cite this article:
He Dong-Hui(何冬慧), Yang Tao(杨涛), Li Wei-Hua(李卫华), Zhang Qing-Lan(张磬兰), and Ma Hong-Ru(马红孺) Brownian dynamics simulation of two confined colloidal particles 2007 Chinese Physics 16 3138
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