Multi-scale calculation of settling speed of coarse particles by accelerated Stokesian dynamics without adjustable parameter

作     者：Long Wang Jiachun Li Jifu Zhou Institute of Mechanics, CAS, 100190 Beijing, China 

作者机构：Institute of Mechanics CAS 100190 Beijing China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2009年第25卷第3期

页      面：303-310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：the National Natural Science Foundation of China (10332050 and 10572144) Knowledge Innovation Program (KJCX-SW-L08) 

主　　题：Sedimentation Stokesian dynamics Many body interactions Multi scale 

摘      要：The calculation of settling speed of coarse particles is firstly addressed, with accelerated Stokesian dynamics without adjustable parameters, in which far field force acting on the particle instead of particle velocity is chosen as dependent variables to consider inter-particle hydrodynamic interactions. The sedimentation of a simple cubic array of spherical particles is simulated and compared to the results available to verify and validate the numerical code and computational scheme. The improved method keeps the same computational cost of the order O（NlogN） as usual accelerated Stokesian dynamics does. Then, more realistic random suspension sedimentation is investigated with the help of Mont Carlo method. The computational results agree well with experimental fitting. Finally, the sedimentation of finer cohesive particle, which is often observed in estuary environment, is presented as a further application in coastal engineering.