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首页> 外文期刊>Journal of Computational Physics >An improved scheme for a Robin boundary condition in discrete-time random walk algorithms
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An improved scheme for a Robin boundary condition in discrete-time random walk algorithms

机译:离散时间随机播放算法中罗宾边界条件的改进方案

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摘要

Random Walk (RW) is a common numerical tool for modeling the Advection-Diffusion equation. In this work, we develop an improved scheme for incorporating a heterogeneous reaction (i.e., a Robin boundary condition) in a discrete-time RW model. In addition, we apply the approach in two test cases. We compare the improved scheme with the classical as well as with analytical and other numerical solution. We show that the new scheme can reduce the computational error significantly, relative to the first order scheme. This reduction comes at no additional computational cost. (C) 2018 Elsevier Inc. All rights reserved.
机译:随机游动(RW)是模拟对流扩散方程的常用数值工具。在这项工作中,我们开发了一种改进方案,用于将非均相反应(即Robin边界条件)纳入离散时间RW模型。此外,我们在两个测试用例中应用了该方法。我们将改进后的格式与经典格式以及解析解和其他数值解进行了比较。我们表明,与一阶格式相比,新格式可以显著减少计算误差。这种减少不需要额外的计算成本。(C) 2018爱思唯尔公司版权所有。

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