Göttingen 2025 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 2: Atmospheric Plasmas and their Applications I
P 2.3: Vortrag
Montag, 31. März 2025, 14:30–14:45, ZHG006
modeling of the ion wind for a surface barrier discharge used for gas conversion — •soad mohsenimehr1, sebastian wilczek2, thomas mussenbrock3, and achim von keudell1 — 1Experimental Physics II, Reactive Plasmas, Ruhr University Bochum, D*44780 Bochum, Germany — 2Technische Hochschule Georg Agricola, Bochum, Germany — 3Chair of Applied Electrodynamics and Plasma Technology, Ruhr University Bochum, D-44780 Bochum, Germany
The ion wind in a surface dielectric barrier discharge (SDBD) plays a crucial role in generating and manipulating the flow field through its electrohydrodynamic force (EHD). This work employs a twin SDBD consisting of an aluminium oxide plate (190*88*0.63 mm) covered by a nickel grid printed on both sides in a comb-like pattern and generated at atmospheric pressure using damped sinusoidal voltage waveforms at kHz frequency. A Schlieren diagnostic was performed and compared with computational fluid dynamic simulation to investigate the flow pattern. This work presents how the EHD force was calculated from a direct time-dependent plasma simulation by the nonPDPSIM platform and incorporated, after proper scaling, into the steady-state flow simulation by COMSOL. Finally, the comparison between numerical simulation and experimental results is reported. It is shown that the origin of the EHD force is not only given by the streamer propagation dynamics but more importantly by the relaxation phase of the boundary region above the dielectric during the decay of the plasma channel.
Keywords: dielectric barrier discharge; ion wind; electrohydrodynamic force; flow pattern