颗粒速度概率密度分布轨道模型及数值模拟  

Particle Velocity PDF/Particles Trajectory Model of Two-Phase Flow and Numerical Simulating

作　　者：郭国庆[1] 徐江荣[2] 

机构地区：[1]杭州广播电视大学,浙江杭州311200 [2]杭州电子科技大学理学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2006年第2期74-77,共4页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：浙江省自然科学基金项目(Y105028)

摘　　要：该文运用颗粒的随机运动方程推导得到的颗粒速度PDF方程,求解颗粒速度PDF方程获得颗粒速度的统计特性,再利用颗粒位置方程来求解颗粒的轨道。通过对颗粒湍流扩散的数值模拟,并与传统随机颗粒模型在颗粒速度均方根值和颗粒位移均方值上进行对比分析,从而得出两种模型优劣情况。Based on the particle velocity PDF equations of the particle＇s stochastic motion, the statistics characteristic of particle velocity is got by using the analytic solution of particle velocity PDF equation, then solve particle trajectory by calculating the new location of particle. Heavy particle dispersion in turbulence flow was simulated numerically, comparing MSD and r. m. s of particles simulated by the new method with that by stochastic particle trajectory model, it is shown that the new method is better than traditional stochastic particle method.

关 键 词：两相湍流 随机轨道模型 数值模拟 

分 类 号：TK121[动力工程及工程热物理—工程热物理]