He presented detailed seminars on the three different topics of his expertise: (1) Overview of the main modelling approaches (kinetic/particle, hybrid, and fluid) for gas discharge plasmas, (2) Modelling in COMSOL Multiphysics: "Equation based" model vs. COMSOL Plasma Module and (3) Chaos and pattern formation in low-temperature plasmas. In the seminars the basic modelling approaches for the gas discharge plasmas were outlined. Finally, a detailed analysis of spatial and temporal pattern formation in a dc driven "barrier" discharge system was presented. In the case of purely temporal oscillations, a transition of the system to chaos through period doubling bifurcations cascade could be identified. Beyond the initial transient regime, numerical solutions reproduced the Hopf or Turing-Hopf instability of the homogeneous stationary state. The agreement between 1d, 2d, and 3d numerical simulations and a linear stability analysis (within its range of validity) were also demonstrated. The visit was sponsored by the German Research Foundation in the frame of the transregional collaborative research centre TRR-87.
