基于LBM-IBM-DEM多孔介质内双/三颗粒迁移特性研究  

Study on the Migration Characteristics of Two/Three Particles in Porous Media Based on LBM-IBM-DEM

作　　者：沈小又 朱康宁 佛斌 蔡杰[1] 席剑飞[1] 顾中铸[1] SHEN Xiaoyou;ZHU Kangning;FO Bing;CAI Jie;XI Jianfei;GU Zhongzhu(School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学能源与机械工程学院,南京210023

出　　处：《工程热物理学报》2025年第1期164-169,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51878356)。

摘　　要：本文为构建数值模拟模型,通过格子Boltzmann法求解液相流场,在模拟中采用IBM和DEM描述细颗粒在拉格朗日坐标下的受力、运动、碰撞和轨迹追踪,通过模拟双/三颗粒在多孔介质内的迁移,研究细颗粒之间的相互干涉,结果表明细颗粒在多孔介质内的迁移受到其他细颗粒的干涉,该干涉依赖于介质内的流体,当一个细颗粒堵塞时,压力分布会重新调整影响其他细颗粒的迁移,同时其他细颗粒的存在可促进或阻碍细颗粒在多孔介质内的迁移。In this paper,in order to construct a numerical simulation model,the liquid-phase flow field is solved by the lattice Boltzmann method,in which IBM and DEM are used to describe the force,motion,collision and trajectory tracking of the fine particles in Lagrangian coordinates,and the mutual interference between the fine particles is investigated by simulating the migration of double/triple particles in the porous medium,and the results show that the migration of the fine particles in porous medium is affected by the interference of other fine particles,and the interference depends on the fluid within the medium.The results show that the migration of fine particles within a porous medium is influenced by other fine particles,which is dependent on the fluid within the medium,and that when one fine particle is clogged,the pressure distribution is readjusted to affect the migration of other fine particles,while the presence of other fine particles can facilitate or hinder the migration of fine particles within the porous medium.

关 键 词：多孔介质 格子BOLTZMANN方法 孔隙率 穿透率 

分 类 号：TK123[动力工程及工程热物理—工程热物理]