Erlangen 2018 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 6: Codes and Modelling

P 6.3: Vortrag

Montag, 5. März 2018, 17:00–17:15, KI 1.174

Towards a tight coupling of fluid model calculations with a multiterm electron Boltzmann solver — •C. M. Hinz1, 2, M. M. Becker2, D. Loffhagen2, and M. Bonitz11ITAP, Christian-Albrechts-Universität zu Kiel, Leibnizstr. 15, 24098 Kiel — 2INP Greifswald, Felix-Hausdorff-Str. 2, 17489 Greifswald

Nonthermal plasmas are frequently described by fluid models using tabulated electron transport and rate coefficients as input. These tables are generated prior to the fluid calculations by solving the steady-state electron Boltzmann equation for given electric field strength, species densities, and atomic data. The present contribution reports on the attempt to enable a tight coupling of a time-dependent, spatially one-dimensional fluid model with an electron Boltzmann solver, which is based on a multiterm expansion of the velocity distribution function in Legendre polynomials. This coupling is realized by concurrently solving the electron kinetic equation for each occurring set of electrical field strength and particle densities determined by the fluid model. To enable this hybrid modelling approach and overcome the significant increase in computational costs, the parallelization framework Qubus (https://qubusproject.org) is used to solve the electron kinetic equation on highly parallel hardware without sacrificing the opportunity to easily adapt the hybrid code to new requirements. The presented results demonstrate the abilities of the hybrid method by the example of an abnormal glow discharge in argon at 1 Torr. Using these first results as a baseline, the advantages and shortcomings of the new approach are discussed.

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