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P: Fachverband Plasmaphysik

P 12: Poster II

P 12.4: Poster

Mittwoch, 22. März 2023, 17:30–19:00, HSZ EG

Numerical modeling of CO₂ microwave discharges: first verification steps of electromagnetics — •Pirmin Almanstötter¹, Dominikus Zielke¹, and Ursel Fantz^1,2 — ¹Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, 85748 Garching — ²AG Experimentelle Plasmaphysik, Universität Augsburg, 86135 Augsburg

To optimize the efficiency of CO₂ conversion processes, microwave plasmas (2.45 GHz) are very promising. Examples are the plasma torch (pressure 20-1000 mbar, power: 0.3-3 kW, flow: 3-100 slm), which can even operate at atmospheric pressure and the surfaguide (pressure 0.3-100 mbar, power: 0.3-1.2 kW, flow: 0.3-10 slm). To accompany experimental optimization efforts and for a systematic investigation, a numerical model is needed that describes the electromagnetics and plasma self-consistently. Before the model can be applied with confidence verification and validation is necessary. This is done for the electromagnetics and the discharge part separately, which consequently will be coupled. The contribution covers the verification of the electromagnetics part. As a first example, solutions of waveguides in cylindrical and rectangular geometries with either dielectric or conducting walls are investigated. It is shown that the solutions obtained by the numerical model match the analytical results.