Computing with large time steps in time-domain electromagnetics

Nikitabahen N. Makwana and Avijit Chatterjee

Journal of Electromagnetic Waves and Applications, 2018, vol. 32, issue 17, 2182-2194

Abstract: The finite volume time-domain method is recast in a large time step (LTS) version to solve the time-domain Maxwell's equations. The LTS method allows the use of time steps much larger than that dictated by the Courant–Friedrich–Lewy criteria for numerical stability in a Godunov-based finite volume framework. Solutions can be obtained much faster and sometimes with higher accuracy compared to conventional time-stepping methods. Results are analyzed for electromagnetic wave propagation in 1D and 2D. Solutions are shown to remain unconditionally stable with an increase in the Courant number.

Date: 2018
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DOI: 10.1080/09205071.2018.1500314

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