三维颗粒群沉降的格子Boltzmann模拟  

Lattice Boltzmann simulation of three-dimensional particle group settlement

作　　者：查露 栗晶[1] 曹传胜[1] 黄议[1] 朱合华[1] 柳朝晖[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《中国科学院大学学报（中英文）》2016年第2期240-246,共7页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(51306065;51390494;51276076);煤燃烧国家重点实验室自主研发基金(FSKLCCB1409)资助

摘　　要：颗粒悬浮运动研究一直是多相流领域中的热点和难点问题,而格子Boltzmann(LB)方法是一种天然并行、易于处理复杂边界的介观方法.本文采用LB-EBF方法对三维悬浮颗粒群进行全解析直接数值模拟,详细分析了1 152颗粒(1 000数量级)的沉降规律,具体分为3个方面:三维多颗粒沉降速度及统计量分析,三维多颗粒沉降位置及统计量分析,三维多颗粒沉降颗粒流场相互作用分析.The motion of particle group has been a hot and difficult problem in the field of multiphase flow, and lattice Bohzmann （LB） method is a natural parallel mesoscopic method which is apt to handle complex boundaries. In this work, LB-EBF method is used for simulation of threedimensional particle group settlement, and we give detailed analyses of the settlement laws of 1 152 particles in three aspects： velocity analysis and statistics analysis of three-dimensional multi-particle sedimentation, position analysis and statistics analysis of three-dimensional multi-particle sedimentation, and analysis of the interaction between particle group and flow field in the sedimentation.

关 键 词：颗粒群沉降 格子BOLTZMANN方法 统计分析 相互作用 

分 类 号：O357.5[理学—流体力学] O359[理学—力学]