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arXiv 1505.06752math.NAcs.NAmath.AP
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广义断续伽辽金方法用于曲面上的双曲和输运主导问题

Discontinuous Galerkin methods for hyperbolic and advection-dominated problems on surfaces

University of Warwick(华威大学);Mathematics Institute and Centre for Scientific Computing(数学研究所与科学计算中心)

Andreas Dedner, Pravin Madhavan

AI总结:

本文提出用于曲面上双曲和输运主导问题的广义断续伽辽金方法,重点研究了离散速度场对稳定性的影响,并通过数值实验验证了理论结果。

摘要:

我们扩展了断续伽辽金(DG)框架,用于分析在隐式定义曲面上提出的一阶双曲和输运主导问题。重点在于双曲部分,其离散化使用了

英文摘要:

We extend the discontinuous Galerkin (DG) framework to the analysis of first-order hyperbolic and advection-dominated problems posed on implicitly defined surfaces. The focus will be on the hyperbolic part, which is discretised using a "discrete surface" generalisation of the jump-stabilised upwind flux. A key issue arising in the analysis (which does not appear in the planar setting) is the treatment of the discrete velocity field, choices of which play an important role in the stability of the scheme. We then prove optimal error estimates in an appropriate norm given a number of assumptions on the discrete velocity field, which are then investigated and discussed in more detail. The theoretical results are verified numerically for a number of test problems exhibiting advection-dominated behaviour.

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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