An improved immersed boundary‐lattice Boltzmann method based on force correction technique |
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| Authors: | Yunan Cai Sheng Li Jianhua Lu |
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| Affiliation: | 1. State Key Laboratory of Structure Analysis for Industrial Equipment, School of Naval Architecture and Ocean Engineering, Dalian University of Technology, Dalian, China;2. Collaborative Innovation Center for Advanced Ship and Deep‐Sea Exploration, Shanghai, China |
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| Abstract: | In this paper, an improved immersed boundary‐lattice Boltzmann method based on the force correction technique is presented for fluid‐structure interaction problems including the moving boundary interfaces. By introducing a force correction coefficient, the non‐slip boundary conditions are much better enforced compared with the conventional immersed boundary‐lattice Boltzmann methods. In addition, the implicit and iterative calculations are avoided; thus, the computational cost is reduced dramatically. Several numerical experiments are carried out to test the efficiency of the method. It is found that the method has the second‐order accuracy, and the non‐slip boundary conditions are enforced indeed. The numerical results also show that the present method is a suitable tool for fluid‐structure interaction problems involving complex moving boundaries. |
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| Keywords: | CFD complex moving boundaries force correction technique FSI problems immersed boundary method lattice Boltzmann method non‐slip boundary condition |
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