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Numerical study of effects of gap and incident wave steepness on water resonance between two rectangular barges
European Journal of Mechanics - B/Fluids ( IF 2.6 ) Pub Date : 2020-12-10 , DOI: 10.1016/j.euromechflu.2020.12.001
Yajie Li , Xikun Wang

A 2D numerical wave tank based on the fully nonlinear potential flow theory is built to simulate the water resonance between two fixed rectangular barges, focusing on the influence of the gap width and incident wave steepness on the liquid motion and hydrodynamic forces on the surrounding bodies. The initial boundary value problem (IBVP) for disturbed velocity potential is solved through boundary element method (BEM) in the time domain. Some special treatments, such as remeshing, smoothing, and jet and plunging wave cutting, are applied to the free surface to suppress the numerical instability. With reference to the gap size, it is found that piston mode is predominant in the case of narrow gap, while higher sloshing modes dominate in the case of wide gap. With the increase in incident wave steepness and hence the associated surface nonlinear effect, the normalised liquid motion in the gap varies slightly when the piston mode dominates, while at higher-order sloshing modes it drops dramatically at or near resonance.



中文翻译:

缝隙和入射波陡度对两个矩形驳船水共振影响的数值研究

建立了基于完全非线性势流理论的二维数值波箱,以模拟两个固定矩形驳船之间的水共振,重点研究了间隙宽度和入射波陡度对周围物体的液体运动和流体动力的影响。通过时域中的边界元方法(BEM)解决了扰动速度势的初始边界值问题(IBVP)。在自由表面上应用了一些特殊处理,例如重新网格化,平滑和射流切入和切入波切,以抑制数值不稳定。关于间隙尺寸,发现在窄间隙的情况下活塞模式占主导,而在宽间隙的情况下较高的晃动模式占主导。

更新日期:2020-12-28
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