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首页> 外文期刊>American journal of fluid dynamics >Capturing of Shock Wave with Controlling the Numerical Dissipation over a Circular Bump
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Capturing of Shock Wave with Controlling the Numerical Dissipation over a Circular Bump

机译:通过控制圆形凸点上的数值耗散来捕获冲击波

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In this paper, an efficient blending procedure based on the density-based algorithm is presented to solve the compressible Euler equations on a non-orthogonal mesh with collocated finite volume formulation. The fluxes of the convected quantities including mass flow rate are approximated by using the characteristic based TVD and ACM and Jameson methods. With noticing that the different characteristics have a different diffusion in comparison together, the aim of the present study is to introduce a method based on the characteristic variables (Riemann solution) and control of the diffusion term in the classic methods in order to capture the shock waves. Hereby, an inviscid supersonic flow is solved and results are compared together in view of resolution and accuracy of shock waves capturing, and solution convergence. Results show TVD method have a good quality in shock wave capturing in comparison to the published results of density based method, while have a less accuracy relative to the ACM method.
机译:本文提出了一种基于密度算法的有效混合方法,用于求解有限体积公式并置的非正交网格上的可压缩欧拉方程。通过使用基于特性的TVD和ACM以及Jameson方法,可以估算出包括质量流率在内的对流通量。注意到不同的特征在比较中具有不同的扩散,因此本研究的目的是介绍一种基于特征变量(Riemann解)和经典方法中扩散项控制的方法,以捕获冲击波浪。从而,解决了超声波流的不粘滞问题,并根据冲击波捕获的分辨率和准确性以及解决方案的收敛性,将结果进行了比较。结果表明,与基于密度的方法的公开结果相比,TVD方法在冲击波捕获方面具有良好的质量,而相对于ACM方法而言,其准确性较低。

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