Abstract
In this article, some local and parallel finite element algorithms are proposed and investigated for the magnetohydrodynamic flows with low electromagnetic Reynolds number. For a solution to this problem, it comprises of two main components, the low-frequency components and the high-frequency components. Motivated by this, we obtain the low-frequency components globally via some relatively coarse grid and catch the high-frequency components locally using a fine grid by some local and parallel procedures. Some local a priori estimates that are crucial for our theoretical analysis are derived. The optimal error estimates are rigorously derived and some numerical tests are reported to support our theoretical findings.


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Acknowledgements
The authors would like to thank the reviewers for their constructive comments, which allowed for the improvement of the presentation of the results.
Funding
This work is subsidized by NSFC (Nos. 12172202,12001139), the Natural Science Foundation of Shandong Province (No. ZR2021MA063), and the Support Plan for Outstanding Youth Innovation Team in Shandong Higher Education Institutions (No. 2021KJ037).
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Shilin Mi: formal analysis, writing, review. Guangzhi Du: conceptualization, methodology, review. Yao Rong: visualization, validation, review. All authors reviewed the manuscript.
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Mi, S., Du, G. & Rong, Y. Local and parallel finite element algorithms for magnetohydrodynamic flows with low electromagnetic Reynolds number. Numer Algor 93, 1661–1683 (2023). https://doi.org/10.1007/s11075-022-01484-8
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DOI: https://doi.org/10.1007/s11075-022-01484-8