A three-dimensional numerical approach on water entry of a horizontal circular cylinder using the volume of fluid technique
A three-dimensional numerical approach on water entry of a horizontal circular cylinder using the volume of fluid technique
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DOI：
10.1016/j.oceaneng.2016.12.018
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发表时间：
2017-01-15
影响因子：
5
通讯作者：
Passandideh-Fard, M.
中科院分区：
文献类型：
--
作者：
Iranmanesh, A.;Passandideh-Fard, M.
本文对低弗朗德数条件下水平圆柱入水的复杂流体力学问题进行了数值研究。采用数值方法对存在自由表面的固液相互作用进行了模拟。三维不可压缩流体流动的控制方程为连续性方程和Navier-Stokes方程以及自由表面平流方程。为了跟踪自由表面运动，将快速虚拟域方法与流体体积（VOF）技术相结合。控制方程在包括水平圆柱在内的计算域内的任何地方都得到求解。刚体运动作用于圆柱所占据的区域。固液界面上的无滑移边界条件是通过增加固体所占区域的粘度来实现的。为了验证数值格式，将结果与文献中已有的实验结果进行了比较。研究了圆柱直径、长度、冲击速度和柱水密度比对无量纲深度的影响。
In this paper, complicated hydrodynamics of a horizontal circular cylinder entering water is investigated numerically for low Fronde numbers. A numerical approach is used to model the solid-liquid interactions in presence of a free-surface. The governing equations for the 3D incompressible fluid flow are continuity and Navier-Stokes equations along with an equation for the free surface advection. To track the free-surface motion, the fast-fictitious-domain method is integrated into the volume-of-fluid (VOF) technique. The governing equations are solved everywhere in the computational domain including the horizontal cylinder. A rigid body motion is applied to the region occupied by the circular cylinder. The no-slip boundary condition on the solid liquid interface is exerted implicitly via increasing the viscosity of the region occupied by the solid. To validate the numerical scheme, the results are compared with those of the experiments available in the literature. The effects of cylinder diameter, length, impact velocity, and cylinder-water density ratio on the non-dimensional depth are also investigated.