A Fully Nonlinear HOBEM with the Domain Decomposition Method for Simulation of Wave Propagation and Diffraction |
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| Authors: | Sheng-chao Jiang Ze-hang Shi Chao Song Gui-yong Zhang Guo-qiang Tang |
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| Institution: | 1.School of Naval Architecture, State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian,China;2.Department of Civil and Environmental Engineering,National University of Singapore,Singapore,Singapore;3.Network and Information Center,Dalian University of Technology,Dalian,China |
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| Abstract: | A higher-order boundary element method (HOBEM) for simulating the fully nonlinear regular wave propagation and diffraction around a fixed vertical circular cylinder is investigated. The domain decomposition method with continuity conditions enforced on the interfaces between the adjacent sub-domains is implemented for reducing the computational cost. By adjusting the algorithm of iterative procedure on the interfaces, four types of coupling strategies are established, that is, Dirchlet/Dirchlet-Neumman/Neumman (D/D-N/N), Dirchlet-Neumman (D-N), Neumman-Dirchlet (N-D) and Mixed Dirchlet-Neumman/Neumman-Dirchlet (Mixed D-N/N-D). Numerical simulations indicate that the domain decomposition methods can provide accurate results compared with that of the single domain method. According to the comparisons of computational efficiency, the D/D-N/N coupling strategy is recommended for the wave propagation problem. As for the wave-body interaction problem, the Mixed D-N/N-D coupling strategy can obtain the highest computational efficiency. |
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