Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm
Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm
复制标题
DOI：
10.2478/v10254-012-0010-3
复制
发表时间：
2012-06
期刊：
影响因子：
--
通讯作者：
R. Panahi
中科院分区：
文献类型：
--
作者：
R. Panahi
利用移动网格算法模拟入水和出水问题特别是在两相（即水和空气）界面处，由于流致载荷、重力和滞留气垫的存在，入水和出水问题的模拟非常复杂。本文试图引入一种基于有限体积的移动网格算法，以模拟粘性不可压缩两相介质中的此类问题。该算法采用分步方法处理压力场和速度场之间的耦合。界面也被捕获通过求解体积分数传输方程。采用四边形控制网格（CV）的贴体附体网格，记录结构周围的载荷、运动和界面流动变化的水动力时程。利用该算法对圆柱体的强迫出水、楔形体的自由对称入水和非对称入水进行了数值模拟。结果表明，所提出的算法是有利的，能够评估这种复杂性相比，实验数据。
Simulation of Water-Entry and Water-Exit Problems Using a Moving Mesh Algorithm Simulation of the water-entry and water-exit particularly, at the interface of two phases i.e. water and air due to the effect of flow-induced loads, gravity force and trapped air cushion presence is very complicated. This paper attempts to introduce a finite volume-based moving mesh algorithm in order to simulate such problems in a viscous incompressible two-phase medium. The algorithm employs a fractional step method to deal with the coupling between pressure and velocity fields. Interface is also captured by solving a volume fraction transport equation. A boundary-fitted body-attached mesh of quadrilateral Control Volumes (CVs) is implemented to record hydrodynamic time histories of loads, motions and interfacial flow changes around the structure. Forced water-exit of a cylinder is simulated based on the introduced algorithm, together with free symmetric and asymmetric water-entry of wedges. Results show that the presented algorithm is favorably capable of assessing such complexities when comparing to experimental data.