Hostname: page-component-7b7567c8c-2n9c9 Total loading time: 0 Render date: 2026-11-15T10:08:40.574Z Has data issue: false hasContentIssue false

Artificial Boundary Conditions for Nonlocal Heat Equations on Unbounded Domain

Published online by Cambridge University Press:  05 December 2016

Wei Zhang*
Affiliation:
Beijing Computational Science Research Centre, Beijing, P.R. China
Jiang Yang*
Affiliation:
Department of Mathematics, Columbia University, New York, NY 10027, USA
Jiwei Zhang*
Affiliation:
Beijing Computational Science Research Centre, Beijing, P.R. China
Qiang Du*
Affiliation:
Department of Mathematics, Columbia University, New York, NY 10027, USA
*
*Corresponding author. Email addresses:wzhang@csrc.ac.cn (W. Zhang), jyanghkbu@gmail.com (J. Yang), jwzhang@csrc.ac.cn (J. Zhang), qd2125@columbia.edu (Q. Du)
*Corresponding author. Email addresses:wzhang@csrc.ac.cn (W. Zhang), jyanghkbu@gmail.com (J. Yang), jwzhang@csrc.ac.cn (J. Zhang), qd2125@columbia.edu (Q. Du)
*Corresponding author. Email addresses:wzhang@csrc.ac.cn (W. Zhang), jyanghkbu@gmail.com (J. Yang), jwzhang@csrc.ac.cn (J. Zhang), qd2125@columbia.edu (Q. Du)
*Corresponding author. Email addresses:wzhang@csrc.ac.cn (W. Zhang), jyanghkbu@gmail.com (J. Yang), jwzhang@csrc.ac.cn (J. Zhang), qd2125@columbia.edu (Q. Du)

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the 'Save PDF' action button.

This paper is concerned with numerical approximations of a nonlocal heat equation define on an infinite domain. Two classes of artificial boundary conditions (ABCs) are designed, namely, nonlocal analog Dirichlet-to-Neumann-type ABCs (global in time) and high-order Padé approximate ABCs (local in time). These ABCs reformulate the original problem into an initial-boundary-value (IBV) problem on a bounded domain. For the global ABCs, we adopt a fast evolution to enhance computational efficiency and reduce memory storage. High order fully discrete schemes, both second-order in time and space, are given to discretize two reduced problems. Extensive numerical experiments are carried out to show the accuracy and efficiency of the proposed methods.

Information

Type
Research Article
Copyright
Copyright © Global-Science Press 2016