Numerical investigation of dbd in neon:effect of fluid modelling approaches

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2021-2-11

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Somay, Mehmet Hilmi

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The study deals with numerical modelling of dielectric barrier discharge (DBD) in Neon gas. The DBD models are based on the drift-diffusion theory of gas discharges. Two different approaches, namely, the so called simple and extended fluid models, are followed. Within the simple fluid model, the ionization rate is approximated by the Townsend formula as a function of the local electric field. In the framework of the extended fluid model, the electron transport (mobility and diffusion) coefficients as well as the rates of the electron induced plasma-chemical reactions are determined as functions of the electron mean energy. These data are determined from the solution of the electron Boltzmann equation, by using Bolsig+ solver and verified by Comsol Multiphysics package. The electron kinetic coefficients are also computed assuming Maxwellian eedf. Numerical simulations are spatially one-dimensional, carried out using Comsol Multiphysics. The effect of different modelling approaches on the characteristics of DBD is investigated.

Subject Keywords

DBD, Townsend

URI

https://hdl.handle.net/11511/89654

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

M. H. Somay, “Numerical investigation of dbd in neon:effect of fluid modelling approaches,” M.S. - Master of Science, Middle East Technical University, 2021.