An unstructured mesh Reynolds-averaged Navier-Stokes (RANS) solver has been developed for numerical simulation of violent sloshing flows inside a tank with complicated inner structures. The numerical solver employs the unstructured multi-dimensional tangent hyperbolic interface capturing method (UMTHINC) for free-surface capturing combined with various turbulence models. The sloshing motion is numerically modeled using the body-force method which introduces a source term into the momentum equation corresponding to the tank motion profile. Numerical simulations of the tank sloshing problems are performed for different test cases with various oscillation frequencies. The performance of the interface capturing method has been discussed and the effect of turbulence model choice on loading predictions is highlighted by studying several RANS models and analyzing its effect on fluid motion and impact pressure. Numerical simulations of the sloshing inside the tank with a vertical baffle has also been conducted and a discussion is provided on different numerical treatment of the baffle.

中文翻译：

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剧烈晃荡流数值模拟的非结构网格方法

已经开发出一种非结构网格雷诺平均Navier-Stokes（RANS）求解器，用于对内部结构复杂的水箱内剧烈晃荡流动进行数值模拟。数值求解器采用非结构化多维正切双曲界面捕获方法（UMTHINC）结合各种湍流模型进行自由表面捕获。使用身体力方法对晃荡运动进行数值建模，该方法将源项引入到与坦克运动曲线相对应的动量方程中。对于不同振动频率的不同测试案例，进行了油箱晃荡问题的数值模拟。通过研究几种RANS模型并分析其对流体运动和冲击压力的影响，讨论了界面捕获方法的性能，并强调了湍流模型选择对载荷预测的影响。还进行了带有垂直挡板的水箱内晃荡的数值模拟，并讨论了挡板的不同数值处理方法。