Large Eddy Simulation of Turbulent Flow using Seamless Immersed Boundary Method

摘要：

　　In this paper,the simulations of incompressible turbulent ow around a moving and deformable object are presented by applying the seamless immersed boundary method (SIBM) to the large eddy simulation (LES) on the Cartesian grid.The static Smagorinsky model with the wall damping function is adopted as modeling the subgrid-scale (SGS) component in the present approach.In order to validate the SIBM for the LES of the ow around a object with moving boundary,the LES of turbulent ow around a moving sphere in the stationary uid is considered.The present result is compared with the reference ones obtained by the LES of the ow around stationary sphere in the uniform ow.It is shown that both results are in very good agreement with each other.Finally,a swimming sh model which is a moving and deformable object is considered.And,the LES of the ow around a sh model under the conditions close to the ow around an actual sh is performed.Then,by the present swimming motion,the vortex sheet arranged in reverse to the Karman vortex sheet can be simulated and the thrust force can be conrmed.

关键词： Computational Fluid Dynamics Computational Method Immersed Boundary Method Turbulent Flow Large Eddy Simulation

作者: Kyohei TAJIRI Hidetoshi NISHIDA Mitsuru TANAKA

作者单位: Department of Mechanical and System Engineering, Kyoto Institute of Technology

会议类型: 国际会议

会议名称: The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)

会议地点: 成都

会议语种:英文

页码: 1-13

在线出版日期: 2014-07-25（万方平台首次上网日期，不代表论文的发表时间）