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首页> 外文期刊>Advances in Difference Equations >A compact finite difference method for reactiona??diffusion problems using compact integration factor methods in high spatial dimensions
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A compact finite difference method for reactiona??diffusion problems using compact integration factor methods in high spatial dimensions

机译:在高空间尺度上使用紧凑积分因子方法的反应扩散问题的紧凑有限差分方法

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This paper proposes and analyzes an efficient compact finite difference scheme for reactiona??diffusion equation in high spatial dimensions. The scheme is based on a compact finite difference method (cFDM) for the spatial discretization. We prove that the proposed method is asymptotically stable for the linear case. By introducing the differentiation matrices, the semi-discrete reactiona??diffusion equation can be rewritten as a system of nonlinear ordinary differential equations (ODEs) in matrices formulations. For the time discretization, we apply the compact implicit integration factor (cIIF) method which demands much less computational effort. This method combines the advantages of cFDM and cIIF methods to improve the accuracy without increasing the computational cost and reducing the stability range. Numerical examples are shown to demonstrate the accuracy, efficiency, and robustness of the method.
机译:本文提出并分析了高空间反应扩散方程的有效紧致有限差分格式。该方案基于用于空间离散化的紧凑有限差分法(cFDM)。我们证明了所提出的方法对于线性情况是渐近稳定的。通过引入微分矩阵,可以将半离散反应扩散方程重新编写为矩阵公式中的非线性常微分方程(ODE)系统。对于时间离散化,我们应用紧凑的隐式积分因子(cIIF)方法,该方法所需的计算量要少得多。该方法结合了cFDM和cIIF方法的优点,以提高精度而又不增加计算成本和减小稳定性范围。数值例子表明了该方法的准确性,效率和鲁棒性。

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