A new unconditionally stable explicit scheme for the convection-diffusion equation with Robin boundary conditions

Xie, Zhihua ORCID: https://orcid.org/0000-0002-5180-8427, Lin, Jianguo and Zhou, Juntao 2008. A new unconditionally stable explicit scheme for the convection-diffusion equation with Robin boundary conditions. International Journal of Computer Mathematics 85 (12) , pp. 1833-1847. 10.1080/00207160701581574

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Abstract

An alternating direction explicit (ADE) scheme to solve the unsteady convection–diffusion equation with Robin boundary conditions is presented and discussed in this paper. It was derived based on the local series expansion method and proved unconditionally stable by von Neumann stability analysis. Thereafter, the ADE scheme is compared with the conventional schemes, and a comparison between the amplification factor of all schemes and the exact one shows that the proposed scheme can simulate well both convection- and diffusion-dominated problems. Finally, the proposed method was validated by a numerical experiment which indicates that, for large cell Reynolds numbers, the proposed scheme, which has unconditional stability, is more accurate than implicit schemes and most explicit schemes. It is also shown that the proposed scheme is simple to implement, economical to use, effective for dealing with Robin boundary conditions and easy to apply to multidimensional problems.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Taylor & Francis
ISSN:	0020-7160
Last Modified:	02 Nov 2022 10:10
URI:	https://orca.cardiff.ac.uk/id/eprint/97699

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