arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.12158math.NAcs.NAmath.AP
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基于Riemann不变量的双曲离散化

Hyperbolic Discretization via Riemann Invariants

Sara Grundel, Michael Herty

摘要:

我们感兴趣的是大规模天然气网络模拟的数值方案。典型的模型是基于等熵欧拉方程与现实的气体常数。数值格式基于黎曼不变量中守恒变量的变换及其相应的数值离散化。所提出的方法的一个特别的新颖之处是允许在网络的节点处的边界和耦合条件的有效离散化的可能性。原离散化的属性,正确地恢复稳定状态,以及解决可能的分析解进行了分析。与现有方法的比较表明了新方法的优越性。

英文摘要:

We are interested in numerical schemes for the simulation of large scale gas networks. Typical models are based on the isentropic Euler equations with realistic gas constant. The numerical scheme is based on transformation of conservative variables in Riemann invariants and its corresponding numerical dsicretization. A particular, novelty of the proposed method is the possbility to allow for an efficient discretization of the boundary and coupling conditions at nodal points of the network. The original discretization is analysed in view of its property to correctly recover steady states as well as to resolve possible analytic solutions. Comparisons with existing methods show the advantage of the novel method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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