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基于势流-黏流双向耦合模型的数值造波 被引量:3

Development of Numerical Wave Model Based on Potential-Viscous Flow Coupling Method
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摘要 采用开源程序OceanWave3D和OpenFOAM提出了一种势流-黏流双向耦合数值造波方法。为提高数值稳定性,在势流域内的重叠区域内建立松弛区域。松弛区域的波高从黏流域直接插值获取,而速度势则根据水面边界条件方程用速度插值间接计算。基于4阶Runge-Kutta算法实现时间推进,并通过线性波、非线性波和不规则波,包括波浪正向、反向传播和二维、三维数值模拟的算例进行验证。计算结果表明,论文的势流-黏流双向耦合模型准确高效,可应用于实际海洋工程波浪的模拟。 The widely used open source OceanWave3D and OpenFOAM are used in the present research, and a novel overlapping two-way coupling strategy is developed. To enhance computational stability, a relaxation zone used for damping at the outlet and data transfer is built over the overlapping region. Free surface elevation in the relaxation zone is directly probed while the velocity potential is indirectly built upon its temporal variation which is calculated under the free surface boundary condition. Strong coupling is achieved based on the fourth-order Runge-Kutta algorithm. Linear waves, nonlinear waves, and irregular waves are selected for the validation tests, where positive and negative propagation cases and numerical modeling in 2D and 3D are conducted. Results show that the proposed model is accurate and efficient, which can be applied in real wave simulation.
作者 钟文杰 陈帆 万德成 ZHONG Wenjie;CHEN Fan;WAN Decheng(Computational Marine Hydrodynamics Lab(CMHL),School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处 《中国造船》 EI CSCD 北大核心 2022年第2期30-40,共11页 Shipbuilding of China
基金 国家自然科学基金项目(52101324,52101366,52131102,51879159) 国家重点研发计划项目(2019YFB1704200,2019YFC0312400)。
关键词 势流模型 黏流模型 数值造波 非线性波 不规则波 potential flow model viscous flow model numerical wave generation nonlinear waves irregular
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