Application of the GRP Scheme for Cylindrical Compressible Fluid Flows

Application of the GRP Scheme for Cylindrical Compressible Fluid Flows
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GRP方案在圆柱可压缩流体流动中的应用

DOI:
10.4208/cicp.oa-2017-0178
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发表时间:
2018
期刊:
Commun. Comput. Phys
影响因子:
--
通讯作者:
Baolin Tian
Baolin Tian
中科院分区:
其他
文献类型:
--
作者:
Rui Chen;Jiequan Li;Baolin Tian

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抽象的。本文致力于应用直接欧拉和拉格朗日广义黎曼问题(GRP)方案来模拟二维圆柱几何中的可压缩流体流动。除了对称性强制的零速度(动量)之外,还特别注意对称中心处数值边界条件的处理。新的处理方法精确地描述了热力学变量如何利用守恒定律在中心附近离散化。此外,拉格朗日GRP方案经过严格验证,满足对称性和守恒性。数值结果证明了这种处理的性能以及该方案在空间和时间上具有二阶精度的对称性保持特性。
Abstract. This paper contributes to apply both the direct Eulerian and Lagrangian generalized Riemann problem (GRP) schemes for the simulation of compressible fluid flows in two-dimensional cylindrical geometry. Particular attention is paid to the treatment of numerical boundary conditions at the symmetric center besides the zero velocity (momentum) enforced by the symmetry. The new treatment precisely describes how the thermodynamical variables are discretized near the center using the conservation property. Moreover, the Lagrangian GRP scheme is verified rigorously to satisfy the properties of symmetry and conservation. Numerical results demonstrate the performance of such treatments and the symmetry preserving property of the scheme with second order accuracy both in space and time.
DOI: 10.1137/s1064827599345248
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