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DNS OF TURBULENT CHANNEL FLOW WITH A ELASTIC CANTILEVER

Koichi Tsujimoto
Department of Mechanical Engineering, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho,Tsu-city, Mie-Pref. Japan

Yasunori Sasaki
Division of Mechanical Engineering Graduate School of Engineering, Mie University 1577 Kurimamachiya-cho, Tsu, 514-8507 Japan

Toshihiko Shakouchi
Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho,Tsu-city, Mie-Pref. Japan

Toshitake Ando
Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho,Tsu-city, Mie-Pref. Japan

Аннотация

Numerical solving of fluid-structure interaction (FSI) problems are of importance in various scientific fields. In particular, the establishment of stable numerical scheme is needed in order to analyze the details of flow phenomena. In the present paper, we propose a weak-coupling method for FSI problem: for a elastic body the rigorous equations of motion are discretized with finite volume method; in the flow computation, the elastic body object is reproduced via immersed boundary method. To demonstrate the performance of proposed scheme, the 3D structure analysis and 3D FSI problems of a elastic body are solved. The results indicate that the computation is stably conducted using the proposed method, in spite of the occurrence of fairly large deformation of the object. In addition it turns out that the realistic flow including turbulence phenomena is well reproduce using the proposed FSI scheme.