Numerical simulations using momentum source wave-maker applied to RANS equation model
Numerical simulations using momentum source wave-maker applied to RANS equation model
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DOI：
10.1016/j.coastaleng.2009.06.009
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发表时间：
2009-10
影响因子：
4.4
通讯作者：
Junwoo Choi;S. Yoon
中科院分区：
文献类型：
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作者：
Junwoo Choi;S. Yoon
对于采用VOF格式的Navier-Stokes方程模型，Lin和Liu（Lin，P. and Liu，P.L.- F.（1999年）。Navier-Stokes方程模型的内部造波器。沃特海岸港海洋工程，125（4），207-215。）开发了一种内部造波机方法，该方法使用连续性方程的质量源函数来产生目标波列。使用这种内部造波机方法，进行了各种数值试验，没有任何问题，由于波反射的造波机。在这项研究中，一个内部造波方法使用的动量源函数的建议。在二维和三维的各种数值模拟中使用的动量源造波机应用到RANS方程模型的CFD代码，FLUENT。为了验证它们在二维情况下的适用性，将动量源造波机在等水深渠道中的计算结果与质量源造波机的计算结果及解析解进行了比较。并对淹没浅滩上的非线性波和平面海滩上的破碎波进行了数值模拟，与实测结果进行了比较。比较结果表明，它们之间有很好的协议。为了考察它们在三维情况下的适用性，本文在等水深盆地中的结果与解析解进行了比较，它们彼此吻合得很好。此外，还利用三维模拟结果，给出了沿岸流的垂向变化规律。
For Navier-Stokes equation model using the VOF scheme, Lin and Liu (Lin, P. and Liu, P.L.-F. (1999). Internal wave-maker for Navier-Stokes equations models. J. Waterw. Port Coast. Ocean Eng., 125 (4), 207–215.) developed an internal wave-maker method for which a mass source function of the continuity equation was used to generate target wave trains. Using this internal wave-maker method, various numerical experiments have been conducted without any problems due to waves reflected by a wave-maker. In this study, an internal wave-maker method using a momentum source function was proposed. Various numerical simulations in two and three dimensions were performed using the momentum source wave-maker applied to the RANS equation model in a CFD code, FLUENT. To verify their applicability in 2 dimensions, the computational results obtained using the momentum source wave-maker in a channel of constant depth were compared with the results obtained by using the mass source wave-maker and with the analytical solutions. And the results of the present numerical simulations of hydraulic experiments, which represent nonlinear waves on a submerged shoal and breaking waves on a plane beach, were compared with measurements. The comparisons showed good agreements between them. To see their applicability into 3-dimensional cases, the present results in a basin of constant depth were compared with the analytical solutions, and they agreed well with each other. In addition, vertical variation of longshore current was presented by using the 3-dimensional simulation results.