München 2019 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Postersitzung

P 18.7: Poster

Donnerstag, 21. März 2019, 16:30–18:30, Foyer Audimax

Hydrodynamic description for the dynamic structure factor of a strongly coupled Yukawa plasma — •Hanno Kählert — ITAP, Christian-Albrechts-Universität zu Kiel

In the small wavenumber and low frequency limit, the dynamic structure factor (DSF) of a strongly coupled Yukawa plasma is well described by linearized hydrodynamics [1]. In this regime, the DSF is characterized by a diffusive thermal mode and two sound modes. The intensities and widths of the peaks are determined by the thermodynamic properties and the transport coefficients of the plasma. Here, the DSF of a strongly coupled Yukawa plasma is calculated from molecular dynamics simulations. The DSF from the simulations is compared with the hydrodynamic model, thereby yielding values for the transport coefficients. The applicability of this method to determine transport data for strongly coupled plasmas is tested by comparing the results with available data [2-4].

[1] J. Mithen, J. Daligault, and G. Gregori, Phys. Rev. E 83, 015401(R) (2011)

[2] J. Daligault, K. O. Rasmussen, and S. D. Baalrud, Phys. Rev. E 90, 033105 (2014)

[3] Z. Donkó and P. Hartmann, Phys. Rev. E 78, 026408 (2008)

[4] T. Ott, M. Bonitz, and Z. Donkó, Phys. Rev. E 92, 063105 (2015)