Schwarz Waveform Relaxation for Heat Equations with Nonlinear Dynamical Boundary Conditions

Schwarz Waveform Relaxation for Heat Equations with Nonlinear Dynamical Boundary Conditions
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具有非线性动态边界条件的热方程的 Schwarz 波形弛豫

DOI:
10.1155/2013/474608
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发表时间:
2013-12
影响因子:
--
通讯作者:
吴树林
吴树林
中科院分区:
--
文献类型:
--
作者:
吴树林

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我们对用区域分解方法求解具有非线性动力边界条件的热方程很感兴趣。在经典框架中,首先对时间方向进行离散化,然后用区域分解方法求解一系列状态稳定问题。本文考虑时空连续水平上的热方程,研究了一种用于并行计算的Schwarz波形松弛算法。我们证明了该算法在长时间区间上线性收敛,并且证明了收敛速度依赖于重叠的大小和非线性边界函数的非线性。数值实验验证了我们的理论结论。
We are interested in solving heat equations with nonlinear dynamical boundary conditions by using domain decomposition methods. In the classical framework, one first discretizes the time direction and then solves a sequence of state steady problems by the domain decomposition method. In this paper, we consider the heat equations at spacetime continuous level and study a Schwarz waveform relaxation algorithm for parallel computation purpose. We prove the linear convergence of the algorithm on long time intervals and show how the convergence rate depends on the size of overlap and the nonlinearity of the nonlinear boundary functions. Numerical experiments are presented to verify our theoretical conclusions.
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