A posteriori analysis of an IMEX entropy-viscosity formulation for hyperbolic conservation laws with dissipation

A posteriori analysis of an IMEX entropy-viscosity formulation for hyperbolic conservation laws with dissipation
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具有耗散的双曲守恒定律的 IMEX 熵粘度公式的后验分析

DOI:
10.1016/j.apnum.2018.08.010
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发表时间:
2019
影响因子:
2.8
通讯作者:
Wildey, Timothy
Wildey, Timothy
中科院分区:
数学2区
文献类型:
--
作者:
Chaudhry, Jehanzeb H.;Shadid, John N.;Wildey, Timothy

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本研究考虑了基于基于多阶段隐式-显式(IMEX)时间积分格式和阻尼双曲型偏微分方程(PDEs)的熵-粘度公式的数值解计算的感兴趣量误差的后测估计的伴随。双曲系统的数值求解具有挑战性,因为需要用不连续或近似不连续的解来稳定系统,以限制非物理振荡并提供准确的解。这项工作的目标是提供基于伴随算子、变分分析和可计算残差的误差估计。误差估计量化了总误差以及数值方法中时间积分方案和数值参数的选择对误差的不同贡献。
This study considers adjoint based a posteriori estimation of the error in a quantity of interest computed from numerical solutions based on multistage implicit–explicit (IMEX) time integration schemes and an entropy-viscosity formulation for damped hyperbolic partial differential equations (PDEs). Hyperbolic systems are challenging to solve numerically due to the need to stabilize systems with discontinuous or nearly discontinuous solutions in an attempt to limit non-physical oscillations and provide accurate solutions. The goal of this effort is to provide error estimates based on adjoint operators, variational analysis and computable residuals. The error estimates quantify the total error as well as different contributions to the error arising from the time integration schemes and choices of numerical parameters in the numerical method.
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