A sliding mesh technique for the finite element simulation of fluid-solid interaction problems by using variable-node elements

Authors:
Yong-Soo Kang;Dongwoo Sohn;Jeong Ho Kim;Hyun-Gyu Kim;Seyoung Im
Affiliations:
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea;Division of Mechanical and Energy Systems Engineering, College of Engineering, Korea Maritime University, 727 Taejong-ro, Yeongdo-gu, Busan 606-791, South Korea;Department of Aerospace Engineering, Inha University, Yonghyun-dong, Namgu, Incheon 402-751, South Korea;Department of Mechanical & Automotive Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 139-743, South Korea;Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, South Korea
Venue:
Computers and Structures
Year:
2014

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Abstract

A new sliding mesh technique for finite element simulation of fluid-solid interaction problems with large structural motions is presented in this paper. Fluid meshes surrounding a solid can slide each other to accommodate a rotational motion of the solid, and a fluid mesh outside the sliding interface can translate through a background fluid mesh. Because of relative motions of sliding fluid meshes and independently designed fluid and solid meshes, non-matching meshes occur at their common interfaces. The non-matching meshes are connected by using variable-node elements which guarantee the continuity, the compatibility and the force equilibrium across the interfaces.