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首页> 外文期刊>American journal of fluid dynamics >Application of Dissipation Filters for Capture of Discontinuities in Pressure-Based Algorithm and Compressible Flows
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Application of Dissipation Filters for Capture of Discontinuities in Pressure-Based Algorithm and Compressible Flows

机译：耗散滤波器在不连续性捕获中的应用（基于压力的算法和可压缩流）

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In this paper, an efficient blending procedure based on the pressure-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 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, unsteady flow in sonic pipe is solved and results are compared together in view of resolution and accuracy of shock waves capturing. Results show TVD method have a good quality in shock wave capturing in comparison to the published results of pressure based method, while have a less accuracy relative to the ACM method.
机译：本文提出了一种基于压力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（黎曼解）和经典方法中扩散项控制的方法，以捕获冲击。波浪。从而，解决了声波管中的不稳定流动，并根据分辨率和冲击波捕获的准确性将结果进行了比较。结果表明，与基于压力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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