中国科学院大学学报2017，Vol.34Issue(2)：198-203,6.DOI:10.7523/j.issn.2095-6134.2017.02.012
颗粒-流体密度比对两相流动不稳定性影响的格子-Boltzmann方法模拟
Lattice-Boltzmann simulation of the effect of particle-fluid density ratio on instability of two-phase flow
摘要
Abstract
A lattice-Boltzmann method is used to simulate the hydrodynamic property of particles in a periodic domain.An Archimedes number of 1 432 is used for the system corresponding to the terminal Reynolds number of 30.Simulations are carried out when the average solid volume fraction is 25％,and the density ratio ranges from 2 to 1 000 (from liquid-particle density ratio to gasparticle density ratio).Investigation of the effect of density ratio on stability of the fluid-particle flow system is carried out.The collision among particles is consideved to be elastic.The variations regulations of mean particle velocity,variance,skewness and kurtosis are obtained and analyzed.By combining with the structure factor analysis,the relationships between particle velocity properties and dynamic clusters are determined at different density ratios when the stable-unstable transition occurs,and the density ratio range is also determined.关键词
格子-Boltzmann方法/颗粒-流体密度比/流动不稳定性Key words
lattice-Boltzmann method/particle-fluid density ratio/flow instability分类
能源科技引用本文复制引用
刘国栋,YIN Xiaolong,王帅,陆慧林,张亚男..颗粒-流体密度比对两相流动不稳定性影响的格子-Boltzmann方法模拟[J].中国科学院大学学报,2017,34(2):198-203,6.基金项目
国家自然科学基金(51106039)和黑龙江省自然科学基金(E201205)资助 （51106039）
