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首页> 外文期刊>Journal of Marine Environmental Engineering >Godunov-Type Wave Diffraction Computations Via Roe's Approximate Riemann Solver
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Godunov-Type Wave Diffraction Computations Via Roe's Approximate Riemann Solver

机译：通过Roe的近似Riemann解算器进行Godunov型波衍射计算

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摘要

The present paper discusses the main features of an elaborate upwind finite volume Godunov-type model of the hyperbolic Mild-Slope Equation that is capable of accommodating the presence of currents in the wave field. Wave transformation in the interface of unstructured triangular cells is computed using Roe's approximate Riemann solver whose efficiency had mostly hitherto been tested in modelling severe discontinuous flows. The spatial accuracy of wave fluxes is of second order, a quality achieved through the enhancement of the polynomial approximation of the conserved variables slope within each cell. Time integration is materialised implicitly while the scheme is characterised of trapezoidal second order accuracy in time marching. Results presented herein demonstrate that the solution technique employed is capable of depicting smoothly and accurately the wave climate in the vicinity of coastal structures.
机译：本文讨论了双曲缓和坡度方程的精心设计的迎风有限体积Godunov型模型的主要特征，该模型能够容纳波场中的电流。使用Roe的近似Riemann求解器可以计算非结构化三角形单元界面中的波变换，该求解器的效率迄今已在模拟严重的不连续流中进行了测试。波通量的空间精度是二阶的，其质量是通过增强每个像元内守恒变量斜率的多项式逼近来实现的。时间积分隐式地实现了，而该方案的特征是时间行进中的梯形二阶精度。本文介绍的结果表明，所采用的解决方案技术能够平稳，准确地描绘出沿海结构附近的波浪气候。

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