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首页> 外文期刊>Computational mathematics and mathematical physics >Application of numerical schemes with singling out the boundary layer for the computation of turbulent flows using eddy-resolving approaches on unstructured grids
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Application of numerical schemes with singling out the boundary layer for the computation of turbulent flows using eddy-resolving approaches on unstructured grids

机译:数值方案在非结构化网格上使用涡流方法计算湍流计算的边界层

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摘要

The use of eddy-resolving approaches to solving problems on arbitrary unstructured grids is investigated. The applications of such approaches requires the use of low dissipation numerical schemes, which can lead to numerical oscillations of the solution on unstructured grids. Numerical oscillations typically occur in domains with large gradients of velocities, in particular, in the near-wall layer. It is proposed to single out the boundary layer and use a numerical scheme with increased numerical dissipation in it. The algorithm for singling out the boundary layer uses a switching function to change the parameters of the numerical scheme. This algorithm is formulated based on the BCD scheme from the family NVD. Its validity and advantages are investigated using the zonal RANS-LES approach for solving some problems of turbulent flow of incompressible fluids.
机译:研究了使用涡流解决任意非结构化网格上的问题的方法。 这种方法的应用需要使用低耗散数值方案,这可以导致非结构化网格上的溶液的数值振荡。 数值振荡通常在具有大速度梯度的结构域中发生,特别是在近壁层中。 建议单个边界层并使用数值方案,其数值耗散增加。 拼写边界层的算法使用切换功能来改变数值方案的参数。 该算法基于来自Family NVD的BCD方案配制。 利用区域rans-les方法来研究其有效性和优势,以解决不可压缩流体湍流的一些问题。

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