Hyperbolic stochastic Galerkin formulation for the p-system

Hyperbolic stochastic Galerkin formulation for the p-system
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DOI:
10.1016/j.jcp.2019.05.049
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发表时间:
2019-10
期刊:
J. Comput. Phys.
影响因子:
--
通讯作者:
Stephan Gerster;M. Herty;Aleksey Sikstel
Stephan Gerster;M. Herty;Aleksey Sikstel
中科院分区:
其他
文献类型:
--
作者:
Stephan Gerster;M. Herty;Aleksey Sikstel

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我们分析了随机双曲系统的性质,使用Galerkin公式,重新制定的随机系统作为一个确定性的多项式混沌模式的演变描述。我们调查的条件,使所得到的系统是双曲。我们以封闭形式陈述特征分解。一个Roe通量和理论结果进行了数值说明。
We analyze properties of stochastic hyperbolic systems using a Galerkin formulation, which reformulates the stochastic system as a deterministic one that describes the evolution of polynomial chaos modes. We investigate conditions such that the resulting systems are hyperbolic. We state the eigendecompositions in closed form. A Roe flux is presented and theoretical results are illustrated numerically.