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首页> 外文期刊>Journal of marine science and technology >SHALLOW WATER FLOW MODELING USING SPACE-TIME LEAST-SQUARES FINITE-ELEMENT METHOD
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SHALLOW WATER FLOW MODELING USING SPACE-TIME LEAST-SQUARES FINITE-ELEMENT METHOD

机译:时空最小二乘有限元法模拟浅水流

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摘要

Various aglogrithms of least-squares finite-element methods (LSFEM) for convection-diffusion equation (CDE) and shallow-water equations (SWE) are formulated. The associated condition number of the resulting system of equations is systematically compared. It is found that condition number of the resulting system of equations depends on the choice of variables, interpolations, and size of element (Ax). In general, a better conditioned system is obtained by introducing auxiliary variable with low-order interpolation. The developed better conditioned shallow-water model is used to simulate wave propagation over a submerged bar and wave propagation past an elliptical hump. Computed results are compared with experiment data and other numerical approximation, and show good agreement.
机译:建立了对流扩散方程(CDE)和浅水方程(SWE)的各种最小二乘有限元算法(LSFEM)。系统地比较了所得方程组的关联条件编号。可以发现,所得方程组的条件数取决于变量,内插和元素(Ax)大小的选择。通常,通过引入具有低阶插值的辅助变量可以获得更好的条件系统。所开发的条件更好的浅水模型用于模拟在水下棒上的波传播和通过椭圆峰的波传播。将计算结果与实验数据和其他数值逼近进行比较,并显示出良好的一致性。

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