Reduced relative entropy techniques for a priori analysis of multiphase problems in elastodynamics

Reduced relative entropy techniques for a priori analysis of multiphase problems in elastodynamics
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DOI:
10.1007/s10543-015-0560-2
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发表时间:
2014-05
影响因子:
1.5
通讯作者:
J. Giesselmann;T. Pryer
J. Giesselmann;T. Pryer
中科院分区:
数学3区
文献类型:
--
作者:
J. Giesselmann;T. Pryer

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我们给出了一个先验分析的半离散不连续Galerkin计划近似解决方案的多相弹性动力学模型,其中涉及的能量密度不仅取决于应变,而且应变梯度。分析中的一个关键组成部分是Giesselmann开发的相对熵稳定性框架(SIAM J Math Anal 46(5):3518-3539,2014)。我们得到的估计是最佳的,在定理m的应变和定理m的速度,其中dG是一个适当的网格相关的空间。
We give an a priori analysis of a semi-discrete discontinuous Galerkin scheme approximating solutions to a model of multiphase elastodynamics which involves an energy density depending not only on the strain but also the strain gradient. A key component in the analysis is thereduced relative entropystability framework developed in Giesselmann (SIAM J Math Anal 46(5):3518–3539, 2014). The estimate we derive is optimal in thenorm for the strain and thenorm for the velocity, wheredGis an appropriate mesh dependent-like space.