基于重叠网格方法的楔形体入水抨击数值模拟

Numerical simulation of wedge water entry slamming based on overset grid method

流体和浮体相互作用是海岸及海洋工程急需研究的热点问题之一。文章基于OpenFOAM建立二维数值水槽,利用VOF(Volume of Fluid)方法来捕捉自由表面,通过使用重叠网格方法来描述流固耦合作用。利用建立的数值模型模拟了楔形物块的垂向和斜向入水抨击过程,对比了不同状况下的抨击压强分布,分析了水平速度对抨击压强分布的影响。模拟结果与理论解吻合较好,表明了该模型能够合理地模拟物块与水的相互作用问题。

The study of the interaction between fluid and floating body is one of important topics in coastal and ocean engineering.In this paper,a two-dimensional numerical flume was established based on OpenFOAM.In the numerical model,VOF(Volume of Fluid)method was used to capture the free surface,and overset grid method was used to describe the fluid-structure interaction.The vertical and oblique water entry slamming processes of wedge were investigated.The slamming pressure under different conditions was compared,and the influence of horizontal velocity on the slamming pressure distribution was analyzed.The simulation results are in good agreement with the theoretical solutions,which shows that the model can reasonably simulate the interaction between the block and water.