Numerical Simulation of Velocity Fluctuations and Dispersion of Sedimentating Particles
Numerical Simulation of Velocity Fluctuations and Dispersion of Sedimentating Particles
复制标题
沉降颗粒速度脉动与弥散的数值模拟
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
E. Hinch
中科院分区：
文献类型：
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作者：
F. R. Cunha;A. J. Sousa;E. Hinch
研究了刚性球形颗粒的单分散稀悬浮液中的速度波动和流体动力分散。在没有布朗运动和惯性的情况下，单个颗粒的速度波动是由于随着颗粒不断变化的构型而变化的流体动力学相互作用而引起的。我们展示了一些点粒子的计算机模拟，该点粒子在具有周期性侧面和不可穿透的底部和顶部的矩形容器中排除体积沉降。模拟再现了实验相关时间和速度波动的各向异性，但其幅度与系统的大小成比例增加。
Velocity fluctuations and hydrodynamic dispersion are studied in a monodisperse dilute suspension of rigid spherical particles. In the absence of Brownian motion and inertia, fluctuations in the velocity of individual particles arise from hydrodynamic interactions varying with the ever-changing configurations of the particles. We show some computer simulations of point particles with excluded volume sedimenting in a rectangular container with periodic sides and impenetrable bottom and top. The simulations reproduce the experimental correlation-time and anisotropy of the velocity fluctuations but have a magnitude increasing proportionally to the size of the system.