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Continuous interior penalty finite element methods for the time-harmonic Maxwell equation with high wave number

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Abstract

In this paper, using the first-order Nédélec conforming edge element space of the second type, we develop and analyze a continuous interior penalty finite element method (CIP-FEM) for the time-harmonic Maxwell equation in the three-dimensional space. Compared with the standard finite element methods, the novelty of the proposed method is that we penalize the jumps of the tangential component of its vorticity field. It is proved that if the penalty parameter is a complex number with negative imaginary part, then the CIP-FEM is well-posed without any mesh constraint. The error estimates for the CIP-FEM are derived. Numerical experiments are presented to verify our theoretical results.

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Acknowledgments

We thank the editor and the anonymous referees, who meticulously read through the paper and made many helpful suggestions which led to an improved presentation of this paper.

Funding

We would like to note that the work of Haijun Wu was partially supported by the National Natural Science Foundation of China under grants 11525103 and 91630309 and the work of the Xuejun Xu was supported by National Natural Science Foundation of China (Grant Nos. 11671302 and 11871272).

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Correspondence to Peipei Lu.

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Communicated by: Jan Hesthaven

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Lu, P., Wu, H. & Xu, X. Continuous interior penalty finite element methods for the time-harmonic Maxwell equation with high wave number. Adv Comput Math 45, 3265–3291 (2019). https://doi.org/10.1007/s10444-019-09737-2

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  • DOI: https://doi.org/10.1007/s10444-019-09737-2

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