A second-order adaptive DLN algorithm with different subdomain variable time steps for the 3D closed-loop geothermal system

In this paper, we propose a second-order adaptive DLN algorithm with different subdomain variable time steps for the 3D closed-loop geothermal system. Theoretically, the stability and convergence of the algorithm in the case of variable time steps are analyzed. In numerical experiments, the DLN algo...

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Veröffentlicht in:Computers & mathematics with applications (1987) Jg. 165; S. 1 - 18
Hauptverfasser: Chen, Lele, Qin, Yi, Gao, Xinyue, Wang, Yang, Li, Yi, Li, Jian
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Ltd 01.07.2024
Schlagworte:
3D closed-loop geothermal system
Adaptive algorithm
Different subdomain variable time steps
DLN algorithm
Different subdomain variable time steps
Adaptive algorithm
3D closed-loop geothermal system
DLN algorithm
ISSN:0898-1221, 1873-7668
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Zusammenfassung:In this paper, we propose a second-order adaptive DLN algorithm with different subdomain variable time steps for the 3D closed-loop geothermal system. Theoretically, the stability and convergence of the algorithm in the case of variable time steps are analyzed. In numerical experiments, the DLN algorithm is combined with an adaptive algorithm to verify not only its effectiveness and second-order convergence under any arbitrary sequence of time steps but also to improve computational efficiency. We overcome the difficulty of 3D programming, and verify the applicability and accuracy of the proposed algorithm by simulating the flow characteristics and heat transfer of the closed-loop geothermal system with 3D convection.
ISSN:0898-1221
1873-7668
DOI:10.1016/j.camwa.2024.03.035