AModeling Study on ParticleDispersion inWall-Bounded Turbulent Flows

作     者：Jian-Hung Lin Keh-Chin Chang 

作者机构：Department of Aeronautics and AstronauticsNational Cheng Kung UniversityNo.1University RdTainan 701Taiwan 

出 版 物：《Advances in Applied Mathematics and Mechanics》 (应用数学与力学进展（英文）)

年 卷 期：2014年第6卷第6期

页      面：764-782页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：support by National Science Council R.O.C.under Grant No.NSC 98-2221-E006-132 

主　　题：Particle-laden flow turbulent dispersion inter-particle collision particle-wall collision. 

摘      要：Three physicalmechanismswhichmay affect dispersion of particle’smotion in wall-bounded turbulent flows,including the effects of turbulence,wall roughness in particle-wall collisions,and inter-particle collisions,are numerically investigated in this *** studies with differentwall roughness extents and with different mass loading ratios of particles are performed in fully developed channel flows with the Eulerian-Lagrangian approach.A low-Reynolds-number k−ǫturbulence model is applied for the solution of the carrier-flow field,while the deterministic Lagrangian method together with binary-collision hard-sphere model is applied for the solution of particle *** is shown that the mechanism of inter-particle collisions should be taken into account in the modeling except for the flows laden with sufficiently low mass loading ratios of *** of wall roughness on particle dispersion due to particle-wall collisions are found to be considerable in the bounded particleladen *** the investigated particles are associated with large Stokes numbers,i.e.,larger than O(1),in the test problem,the effects of turbulence on particle dispersion aremuch less considerable,as expected,in comparison with another two physical mechanisms investigated in the study.