München 2019 – wissenschaftliches Programm
P 18.37: Poster
Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax
Numerical study of the transport phenomena for an atmospheric-pressure plasma jet in contact with liquid — •I. L. Semenov, K.-D. Weltmann, and D. Loffhagen — Leibniz Institute for Plasma Science and Technology (INP), 17489 Greifswald, Germany
The interaction of cold atmospheric-pressure plasmas with liquids has become the subject of intense research due to its importance for biomedical applications. At present, plasma jets are the most common plasma sources applied in experimental studies. The reactive oxygen and nitrogen species generated by the jet are responsible for the plasma-induced changes in chemical properties of liquids. The transport of plasma-generated species from the gas into the liquid phase is determined by the convection flow in the considered system. In this work we present results of a modelling study on the transport processes for an atmospheric-pressure argon plasma jet in contact with liquid under typical experimental conditions. The flow field is studied by solving the Navier-Stokes equations and the transport of species is given by the solution of the convection-diffusion equation on the example of hydrogen peroxide. The basic equations are solved numerically using the finite-element method. The modelling results are in good agreement with available experimental data. It is shown that the convective flow in the liquid exhibits a complicated three-dimensional structure. In addition, the model is found to provide a reliable estimate for the hydrogen peroxide diffusion flux from the gas into the liquid phase.