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P: Fachverband Plasmaphysik

P 16: Low Pressure Plasmas II & Dusty Plasmas II

P 16.2: Talk

Friday, September 3, 2021, 11:30–11:45, H2

Simulations and Experiments of Phase Separation in Binary Dusty Plasmas — •Stefan Schütt and André Melzer — Institute of Physics, University of Greifswald

Molecular dynamics simulations of binary dusty plasmas have been performed and their behavior with respect to the phase separation process has been analyzed. The simulated system was inspired by experimental research on phase separation in dusty plasmas under microgravity on parabolic flights. Despite vortex formation in the experiment and in the simulations the phase separation could be identified. From the simulations it is found that even the smallest charge disparities lead to phase separation. The separation is due to the force imbalance on the two species and it becomes stronger with increasing size disparity or decreasing mean particle size. In comparison, experiments on phase separation have been performed and analyzed in view of the separation dynamics. It is found that the experimental results are reproduced by the simulation regarding the dependency on the size disparity of the two particle species.