Accurate fluid-structure interaction computations using elements without mid-side nodes

Authors:
Shinsuke Nagaoka;Yasushi Nakabayashi;Genki Yagawa;Young Jin Kim
Affiliations:
Toyo University, Kawagoe, Japan;Information Sciences and Arts, Toyo University, Kawagoe, Japan;Toyo University, Kawagoe, Japan;Mechanical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
Venue:
Computational Mechanics
Year:
2011

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Abstract

The paper proposes a new analysis method for fluid-structure problems, which has nodal consistency at the fluid-structure interface and its calculation efficiency and accuracy are high. The incompressible viscous fluid analysis method using the P1-P1 element based on SUPG/PSPG developed by Tezduyar et al. is used for fluid analysis, while the high-accuracy analysis method based on EFMM developed by the authors is adopted for structure analysis. As the common feature of these methods, it is possible to analyze a fluid or a structure rather accurately by using the first-order triangular or tetrahedral elements. In addition, variables are exchanged exactly at the common nodes on the fluid-structure boundary without deteriorating accuracy and calculation efficiency due to the interpolation of variables between nodes. The present method is applied to a fluid-structure interaction problem by simulating the deformation of a red blood cell.