Diffusion coefficient of Brownian particle in rough micro-channel |
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Authors: | Jun Chen Peng X F Lee D J |
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Affiliation: | Thermal Engineering Department, Tsinghua University, Beijing 100084, China. |
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Abstract: | This study examines the feasibility of using of the lattice Boltzmann method to determine how the surface roughness of a quadrate channel affects the diffusion coefficient of Brownian particle(s). The surface was represented by a regular array of spheres. Surface roughness reduced the diffusion coefficient of the Brownian particle(s) because of a change in the velocity autocorrelation function decay and in pressure. Additionally, the neighboring particles increased the diffusion coefficient of Brownian particle. |
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