Parallel Performance of a Discontinuous Galerkin Spectral Element Method Based PIC-DSMC Solver
Particle based methods are required to simulate rarefied, reactive plasma flows. A combined Particle-in-Cell Direct Simulation Monte Carlo method is used here, allowing the modelling of electromagnetic interactions and collision processes. The electromagnetic field solver of the Particle-in-Cell method has been improved by switching to a discontinuous Galerkin spectral element method. The method offers a high parallelization efficiency, which is demonstrated in this paper. In addition, the parallel performances of the complete Particle-in-Cell module and the Direct Simulation Monte Carlo module are presented.
We gratefully acknowledge the Deutsche Forschungsgemeinschaft (DFG) for funding within the project “Kinetic Algorithms for the Maxwell-Boltzmann System and the Simulation of Magnetospheric Propulsion Systems”. T. Stindl thanks the Landesgraduiertenförderung Baden-Württemberg and the Erich-Becker-Stiftung, Germany, for their previous financial support. Computational resources have been provided by the Bundes-Höchstleistungsrechenzentrum Stuttgart (HLRS).
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