Two-dimensional numerical simulation and experiment on strongly nonlinear wave–body interactions
Two-dimensional numerical simulation and experiment on strongly nonlinear wave–body interactions
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DOI：
10.1007/s00773-008-0031-4
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发表时间：
2009-06
影响因子：
2.6
通讯作者：
Changhong Hu;M. Kashiwagi
中科院分区：
文献类型：
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作者：
Changhong Hu;M. Kashiwagi
针对强非线性波体相互作用问题，提出了一种基于约束内插轮廓(CIP)的笛卡儿网格方法，并通过一个新设计的二维波道实验进行了验证。在实验中，使用了一个矩形截面形状的浮体。在甲板上安装了上层建筑，并采用了小型浮体干板，以便于获得甲板上的水现象。进行了垂荡强迫振动试验和波体相互作用试验。数值模拟采用本文所述的基于CIP的笛卡尔网格法。CIP格式被应用于基于笛卡尔网格的流动求解器。该方法的新改进包括应用双曲线正切进行界面捕捉的界面捕捉方法(THINC)和浮体的虚拟粒子方法。溃坝计算表明了THINC格式的有效性。对受迫振动试验和波体相互作用试验的试验问题进行了数值模拟，并与实测值进行了比较。所有这些比较都相当不错。数值算例表明，基于CIP的笛卡尔网格法是预报强非线性波体相互作用的一种准确有效的方法。
A constrained interpolation profile (CIP)-based Cartesian grid method for strongly nonlinear wave–body interaction problems is presented and validated by a newly designed experiment, which is performed in a two-dimensional wave channel. In the experiment, a floating body that has a rectangular section shape is used. A superstructure is installed on the deck and a small floating-body freeboard is adopted in order to easily obtain water-on-deck phenomena. A forced oscillation test in heave and a wave–body interaction test are carried out. The numerical simulation is performed by the CIP-based Cartesian grid method, which is described in this paper. The CIP scheme is applied in the Cartesian grid-based flow solver. New improvements of the method include an interface-capturing method that applies the tangent of hyperbola for interface capturing (THINC) scheme and a virtual particle method for the floating body. The efficiency of the THINC scheme is shown by a dam-breaking computation. Numerical simulations on the experimental problem for both the forced oscillation test and the wave–body interaction test are carried out, and the results are compared to the measurements. All of the comparisons are reasonably good. It is shown, based on the numerical examples, that the present CIP-based Cartesian grid method is an accurate and efficient method for predicting strongly nonlinear wave–body interactions.