ANALYSIS OF BASSET FORCE OF PARTICLE MOTION IN TURBULENT FLOWS WITH SPECTRAL METHOD  

作　　者：Liu, Xiao-Bing  Wang, Jing  Li, Qing-Gang 

机构地区：[1] Sichuan Univ. of Sci. and Technol., Chengdu 610039, China

出　　处：《Journal of Hydrodynamics》2001年第4期88-91,共4页水动力学研究与进展B辑（英文版）

基　　金：theNationalNaturalScienceFoundationofChina .(No :5 0 1790 2 1)

摘　　要：Using the spectral method from the Lagrangian particle motion equation, the particle motion statistics in solid-liquid turbulent flows, including the particle Lagrangian energy spectrum, autocorrelation function and turbulent diffusivity, were analyzed. The effects of the Basset term on these statistics were examined. It is found that the Basset force may be neglected in the Lagrangian equation of particle motion only when a dimensionless number N is very small and the particle diameter, in general, is less than 0.1 mm. The numerical results indicate that the particle diffusivity may exceed the fluid diffusivity for significantly long period.Using the spectral method from the Lagrangian particle motion equation, the particle motion statistics in solid-liquid turbulent flows, including the particle Lagrangian energy spectrum, autocorrelation function and turbulent diffusivity, were analyzed. The effects of the Basset term on these statistics were examined. It is found that the Basset force may be neglected in the Lagrangian equation of particle motion only when a dimensionless number N is very small and the particle diameter, in general, is less than 0.1 mm. The numerical results indicate that the particle diffusivity may exceed the fluid diffusivity for significantly long period.

关 键 词：Turbulent flow 

分 类 号：O368[理学—流体力学]