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A sharp-interface immersed smoothed point interpolation method with improved mass conservation for fluid-structure interaction problems

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Journal of Hydrodynamics 2020年第2期32卷 267-285页

作者： Bo-qian Yan Shuangqiang Wang Gui-yong Zhang Chen Jiang Qi-hang Xiao Zhe Sun State Key Laboratory of Structural Analysis for Industrial Equipment School of Naval ArchitectureDalian University of TechnologyDalian116023China Department of Fisheries and Oceans Bedford Institute of OceanographyDartmouthCanada Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai200240China Key Laboratory of Traffic Safety on Track of Ministry of Education School of Traffic and Transportation EngineeringCentral South UniversityChangsha410076China Joint International Research Laboratory of Key Technology for Rail Traffic Safety Central South UniversityChangsha410076China National and Local Joint Engineering Research Center of Safety Technology for Rail Vehicle Central South UniversityChangsha410076China

To solve the problem of inaccurate boundary identification and to eliminate the spurious pressure oscillation in the previously developed immersed smoothed point interpolation method(IS-PIM),a new sharp-interface IS-PIM combining mass conservation algorithm,called Sharp-ISPIM-mass,is proposed in this *** on the so called sharp-interface method,the technique of quadratic local velocity reconstruction has been developed by combining with the mass conservation algorithm,which enables the present method improve the accuracy of the velocity field and satisfy the mass conservation condition near the boundary *** the proposed method would not encounter the problem of spurious mass *** addition,a new form of FSI force evaluation considering pressure and viscous force to perform a whole function from the fluid domain to fictitious fluid domain is introduced,which makes the present method obtain more accurate results of FSI force than the original *** the numerical studies of a number of benchmark examples,the performance of the Sharp-ISPIM-mass has been examined and illustrated.

关键词： Sharp-interface technique immersed type method mass conservation algorithm fluid-structure interaction(FSI)

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