Behaviors of Spherical and Nonspherical Particles in a Square Pipe Flow

作     者：Takaji Inamuro Hirofumi Hayashi Masahiro Koshiyama 

作者机构：Department of Aeronautics and AstronauticsGraduate School of EngineeringKyoto UniversityKyoto 606-8501Japan Advanced Research Institute of Fluid Science and EngineeringGraduate School of EngineeringKyoto UniversityKyoto 606-8501Japan 

出 版 物：《Communications in Computational Physics》 (计算物理通讯（英文）)

年 卷 期：2011年第9卷第5期

页      面：1179-1192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] 0704[理学-天文学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work is partly supported by the Grant-in-Aid for Scientific Research(No.18360089)from JSPS the COE program(the Center of Excellence for Research and Education on Complex Functional Mechanical Systems)of the Ministry of Education,Culture,Sports,Science and Technology,Japan 

主　　题：Lattice Boltzmann method square pipe flow spherical particle biconcave discoid particle 

摘      要：The lattice Boltzmann method(LBM)for multicomponent immiscible fluids is applied to the simulations of solid-fluid mixture flows including spherical or nonspherical particles in a square pipe at Reynolds numbers of about 100.A spherical solid particle is modeled by a droplet with strong interfacial tension and large viscosity,and consequently there is no need to track the moving solid-liquid boundary ***(discoid,flat discoid,and biconcave discoid)solid particles are made by applying artificial forces to the spherical *** is found that the spherical particle moves straightly along a stable position between the wall and the center of the pipe(the Segr´e-Silberberg effect).On the other hand,the biconcave discoid particle moves along a periodic helical path around the center of the pipe with changing its orientation,and the radius of the helical path and the polar angle of the orientation increase as the hollow of the concave becomes large.