A Fluctuating Lattice-Boltzmann Model for Direct Numerical Simulation of Particle’S Brownian Motion
A single-relaxation-time fluctuating lattice-Boltzmarm(LB)model for direct numerical simulation(DNS)of particle，s Brownian motion is established by adding a fluctuating component to the lattice-Boltzmann equations(LBEs)．The fluctuating term is proved to be the random stress tensor in fluctuating hydrodynamics by recovering Navier-Stokes equations from LBEs through a Chapman-Enskog expansion．A three-dimensional implementation of the model is also presented，along with simulations of a single spherical particle and 125 spherical particles at short times．Numerical results including the mean．square displacement．velocity autocorrelation function and self-diffusion coefficient of particles compare favorably with theoretical results and previous numerical resuits．
波动流体力学 数值模拟 布朗运动 粒子运动 波动格子
Nie Deming Lin Jianzhong
State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University,Hangzhou,Zhejiang310027, China,China Jiliang University,Hangzhou,Zhejiang310018,China
国内会议
上海
英文
853-858
2008-12-08（万方平台首次上网日期，不代表论文的发表时间）