Numerical Investigation of the Dynamics of a Flexible Filament in the Wake of Cylinder

查看全文 作　　者：Ru-Nan [1]Hua;Luoding [2]Zhu;Xi-Yun [1]Lu 机构地区：[1]Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,China;[2]Department of Mathematical Sciences,Indiana University-Purdue University Indianapolis,402 North Blackford Street,Indianapolis,IN 46202,USA 出　　处：《Advances in Applied Mathematics and Mechanics》索引2014年第6卷第4期,共16页 基　　金：the National Natural Science Foundation of China(Grant No.11372304)and the 111 Project(Grant No.B07033)。 摘　　要：Fluid-structure-interaction problems are ubiquitous,complicated,and not yet well understood.In this paper we investigate the interaction of a leading rigid circular cylinder and a trailing compliant filament and analyze the dynamic responses of the filament in the wake of the cylinder.It is revealed that there exist two flapping states of the filament depending on the cylinder-filament separation distance and the relevant critical distance distinguishing the two states is associated with the Reynolds number and the filament length.It is also found that the drag coefficient of the cylinder is reduced but that of the filament may be increased or decreased depending on its length.Compared with a single filament in a uniform flow,the filament of the same mechanical properties flapping in the wake of the cylinder has a lower frequency and a greater amplitude. 关 键 词：Fluid-structure interaction immersed boundary-lattice Boltzmann method