SEDIMENTATION OF CIRCULAR PARTICLES IN OLDROYDB FLUID  

作　　者：SHAOXue-ming YUZhao-sheng 

机构地区：[1]DepartmentofMechanics,ZhejiangUniversity,Hangzhou310027,China, [2]DepartmentofMechanicalandMechatronicEngineering,TheUniversityofSydney,NSW2006,Australia

出　　处：《Journal of Hydrodynamics》2004年第3期254-259,共6页水动力学研究与进展B辑（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (GrantNo :10 10 2 0 17)andNationalNaturalScienceFoundationofZhejiangProvince(GrantNo :10 10 4 7)

摘　　要：The sedimentation of circular particles in a vertical channel filled withOldroyd ― B fluid was studied by an improved Distributed Lagrange Multiplier/fictitious domain(DLM) method. The sedimenting behaviors of two particles are presented firstly, which shows that,when the particles are dropped in a viscoealstic fluid, the stable configuration is the one wherethe particles are aligned parallel to the flow direction when the Mach number Mis less than 1 andthe elasticity number E is greater than 1. This agrees well with the known experimental in Ref. [1]and simulation results in Ref. [2]. Our simulations also show that, as in Newtonian fluid, thesedimentation of the particles will be accelerated due to the .interaction between particles in aviscoealstic fluid.The sedimentation of circular particles in a vertical channel filled withOldroyd ― B fluid was studied by an improved Distributed Lagrange Multiplier/fictitious domain(DLM) method. The sedimenting behaviors of two particles are presented firstly, which shows that,when the particles are dropped in a viscoealstic fluid, the stable configuration is the one wherethe particles are aligned parallel to the flow direction when the Mach number Mis less than 1 andthe elasticity number E is greater than 1. This agrees well with the known experimental in Ref. [1]and simulation results in Ref. [2]. Our simulations also show that, as in Newtonian fluid, thesedimentation of the particles will be accelerated due to the .interaction between particles in aviscoealstic fluid.

关 键 词：SEDIMENTATION circular particle distributed lagrange multiplier/fictitiousdomain (DLM) method visco-elastic fluid 

分 类 号：O357[理学—流体力学]