Numerical Simulation of Sphere Water Entry Problem Based On VOF And Dynamic Mesh Methods
Numerical Simulation of Sphere Water Entry Problem Based On VOF And Dynamic Mesh Methods
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作者：
Zhi-rong Shen;D. Wan
本文介绍了单个低密度球从空气中落入水中的数值实验。一个在空气中具有初速的球体被释放到水面上，当它接触水面时会产生水花和波浪；之后，它会因为浮力而跃出水面。采用基于VOF方法和动态网格法的开放源码野外操作与操纵(OpenFOAM)软件对该过程进行了模拟。给出了水动力时程和球体运动时程的计算结果。为了证明该方法的正确性，进行了网格和时间收敛的验证。讨论了球体周围的速度场和压力分布的结果。
This paper presents a numerical experiment of single low-density sphere falling into the water from the air. A sphere with initial speed in the air was released above the water surface, splashes and waves will be generated when it touched the water; after that, it jumped above water because of buoyancy. The procedure is simulated by the Open source Field Operation and Manipulation (OpenFOAM) based on VOF method and dynamic mesh method. The result of time history of hydrodynamic forces and sphere's motion is given. Validations of grid and time convergence are performed in order to prove the correctness of this method. Results of the velocity field and the pressure distribution around the sphere are discussed.