Numerical investigation of water entry of a wedge into waves with current effects using a fully nonlinear HOBEM
Numerical investigation of water entry of a wedge into waves with current effects using a fully nonlinear HOBEM
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使用完全非线性 HOBEM 对楔形水进入波浪和电流效应进行数值研究
DOI：
10.1016/j.oceaneng.2018.01.092
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发表时间：
2018-04
影响因子：
5
通讯作者：
Oleg Gaidai
中科院分区：
文献类型：
--
作者：
Cheng Yong;Ji Chunyan;Zhai Gangjun;Oleg Gaidai
本文研究了在均匀水流作用下，二维非对称楔体在重力作用下斜入波时的水动力特性。为了解决这一问题，提出了基于势理论的全非线性边界条件下的时域高阶边界元法。在空间域中采用拉伸坐标系，避免了初始阶段在固定计算域中离散大量元素。在网格重划和插值过程中，采用拉伸坐标系的旋转方案，以满足交点处通量连续性的要求。引入辅助函数计算体表压力分布。在没有水流的情况下，用已发表的数值结果对模型进行了验证。通过数值计算，分析了自由面高程和压力分布对流速、入射波振幅、入口位置、跟角和斜向运动等物理参数的依赖关系。研究发现，流速的变化对流体的水平流速和波浪陡度都有明显的影响，而波浪陡度对自由表面和压力起主要作用。
This paper concerns the hydrodynamic performance of a two-dimensional asymmetric wedge entering waves obliquely with gravity effect in the presence of a uniform current. A time-domain higher-order boundary element method (HOBEM) based on potential theory with fully nonlinear boundary conditions is developed to solve this problem. A stretched coordinate system is adopted in the spatial domain to avoid a large number of elements discretized in fixed computational domain at the initial stage. During mesh regriding and interpolation, a rotation scheme of the stretched coordinate system is employed to meet the requirement of continuity of flux at the intersection points. An auxiliary function is introduced to calculate pressure distribution on body surface. The present model is validated against the published numerical results for vertical wave entry in the absence of currents. Numerical calculations are conducted to analyze the dependence of the free surface elevation and the pressure distribution on the physical parameters, such as current velocity, incident wave amplitude, entry location, heel angle and oblique motion. It is found that the variation of current velocity has obvious effect on both the horizontal velocity of fluid and the wave steepness, which play a major role on free surface and pressure.
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影响因子：
3.6
作者：
Bao C. M.;Wu G. X.;Xu G. D.
通讯作者：
Xu G. D.
DOI：
10.1061/(asce)ww.1943-5460.0000256
发表时间：
2014-09
期刊：
Journal of Waterway, Port, Coastal and Ocean Enginnering
影响因子：
--
作者：
Bin Teng;Bin Teng;Li-fen Chen;Li-fen Chen
通讯作者：
Li-fen Chen
DOI：
--
发表时间：
2013
期刊：
--
影响因子：
--
作者：
E. Larsen
通讯作者：
E. Larsen
影响因子：
1.9
作者：
A. Korobkin
通讯作者：
A. Korobkin
影响因子：
5
作者：
Iranmanesh, A.;Passandideh-Fard, M.
通讯作者：
Passandideh-Fard, M.