Abstract
We investigate a fully discrete finite element scheme for the three-dimensional incompressible magnetohydrodynamic problem based on magnetic vector potential formulation that was introduced in Hiptmair et al. (MMMAS 28:659–695, 2018). The formulation enjoys the novel feature that it can always produce an exactly divergence-free magnetic induction discretized solution. Using a mixed finite element approach, we discretize the model by the fully discrete semi-implicit Euler scheme with the velocity and the pressure approximated by stable MINI finite elements and the magnetic vector potential by Nédélec edge elements. Under a reasonable regularity hypothesis for the exact solution, error estimates for the velocity and the magnetic vector potential are rigorously established. Finally, several numerical experiments are presented to illustrate the convergence properties of the numerical scheme.








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The authors thank the anonymous referees very much for their helpful comments and suggestions which helped to improve the presentation of this paper.
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The first author funded by China Postdoctoral Science Foundation (2021M691951). The third author was supported by National Natural Science Foundation of China (No. 11871467) and the Major State Research Development Program of China (No. 2016YFB0201304).
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Ding, Q., Long, X. & Mao, S. Error Estimate of a Fully Discrete Finite Element Method for Incompressible Vector Potential Magnetohydrodynamic System. J Sci Comput 88, 71 (2021). https://doi.org/10.1007/s10915-021-01571-3
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DOI: https://doi.org/10.1007/s10915-021-01571-3