A Novel Fully Decoupled Scheme for the MHD System with Variable Density
In this paper, we first establish a novel first-order, fully decoupled, unconditionally stable time discretization scheme for the MHD system with variable density. This scheme successfully decouples all the coupling terms by combining the gauge-Uzawa method and the scalar auxiliary variable (SAV) me...
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Published in | Journal of computational methods in applied mathematics Vol. 25; no. 1; pp. 215 - 236 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Minsk
De Gruyter
01.01.2025
Walter de Gruyter GmbH |
Subjects | |
Online Access | Get full text |
ISSN | 1609-4840 1609-9389 |
DOI | 10.1515/cmam-2024-0004 |
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Abstract | In this paper, we first establish a novel first-order, fully decoupled, unconditionally stable time discretization scheme for the MHD system with variable density.
This scheme successfully decouples all the coupling terms by combining the gauge-Uzawa method and the scalar auxiliary variable (SAV) method.
And we prove its unconditional energy stability.
Then we give the first-order finite element scheme and its implementation.
Furthermore, we perform a rigorous error analysis of the proposed numerical scheme.
Finally, we perform some numerical experiments to demonstrate the effectiveness of the decoupling scheme. |
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AbstractList | In this paper, we first establish a novel first-order, fully decoupled, unconditionally stable time discretization scheme for the MHD system with variable density. This scheme successfully decouples all the coupling terms by combining the gauge-Uzawa method and the scalar auxiliary variable (SAV) method. And we prove its unconditional energy stability. Then we give the first-order finite element scheme and its implementation. Furthermore, we perform a rigorous error analysis of the proposed numerical scheme. Finally, we perform some numerical experiments to demonstrate the effectiveness of the decoupling scheme. In this paper, we first establish a novel first-order, fully decoupled, unconditionally stable time discretization scheme for the MHD system with variable density. This scheme successfully decouples all the coupling terms by combining the gauge-Uzawa method and the scalar auxiliary variable (SAV) method. And we prove its unconditional energy stability. Then we give the first-order finite element scheme and its implementation. Furthermore, we perform a rigorous error analysis of the proposed numerical scheme. Finally, we perform some numerical experiments to demonstrate the effectiveness of the decoupling scheme. |
Author | Wang, Zhaowei Wang, Danxia Jia, Hongen |
Author_xml | – sequence: 1 givenname: Zhaowei orcidid: 0009-0006-6793-8492 surname: Wang fullname: Wang, Zhaowei email: 2544013412@qq.com organization: School of Mathematics, 47846 Taiyuan University of Technology , Taiyuan 030024, Shanxi, P. R. China – sequence: 2 givenname: Danxia surname: Wang fullname: Wang, Danxia email: 2621259544@qq.com organization: School of Mathematics, 47846 Taiyuan University of Technology , Taiyuan 030024, Shanxi, P. R. China – sequence: 3 givenname: Hongen surname: Jia fullname: Jia, Hongen email: jiahongen@tyut.edu.cn organization: School of Mathematics, 47846 Taiyuan University of Technology , Taiyuan 030024, Shanxi, P. R. China |
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Snippet | In this paper, we first establish a novel first-order, fully decoupled, unconditionally stable time discretization scheme for the MHD system with variable... |
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SubjectTerms | 65Mxx 65N12 65N22 65Nxx Decoupling Density Error Analysis Fully Decoupled Gauge-Uzawa Method Mathematical analysis Mathematics Unconditionally Stable Variable Density |
Title | A Novel Fully Decoupled Scheme for the MHD System with Variable Density |
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