An adaptive GRP scheme for compressible fluid flows

An adaptive GRP scheme for compressible fluid flows
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可压缩流体流动的自适应 GRP 方案

DOI:
10.1016/j.jcp.2009.10.038
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发表时间:
2010-03
影响因子:
4.1
通讯作者:
Tang, Huazhong
Tang, Huazhong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Han, Ee;Li, Jiequan;Tang, Huazhong

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本文提出了一种求解一、二维可压缩流体流动的二阶精度自适应广义黎曼问题(GRP)格式。目前的方案包括两个独立的部分:网格重分布和PDE进化。第一部分是一个迭代过程。在每次迭代中,网格点首先被重新分配,然后使用保守插值公式来计算单元平均值和保守变量的斜率。第二部分是用欧拉GRP格式求解固定非均匀网格上的可压缩流体流动,并将其直接推广到二维任意四边形网格上。数值算例表明,本文提出的自适应GRP格式不仅在网格点较少的情况下提高了数值解的分辨率和精度,而且有效地减小了可能出现的误差或振荡。
This paper presents a second-order accurate adaptive generalized Riemann problem (GRP) scheme for one and two dimensional compressible fluid flows. The current scheme consists of two independent parts: Mesh redistribution and PDE evolution. The first part is an iterative procedure. In each iteration, mesh points are first redistributed, and then a conservative interpolation formula is used to calculate the cell-averages and the slopes of conservative variables on the resulting new mesh. The second part is to evolve the compressible fluid flows on a fixed nonuniform mesh with the Eulerian GRP scheme, which is directly extended to two-dimensional arbitrary quadrilateral meshes. Several numerical examples show that the current adaptive GRP scheme does not only improve the resolution as well as accuracy of numerical solutions with a few mesh points, but also reduces possible errors or oscillations effectively.
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发表时间: 2006-08
期刊: J. Comput. Phys.
影响因子: --
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