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P: Fachverband Plasmaphysik
P 14: Poster: Komplexe und Staubige Plasmen
P 14.9: Poster
Thursday, February 28, 2013, 14:00–16:00, Poster EG
Heat Transport in Confined 2D Dust Clusters — Giedrius Kudelis1, •Hauke Thomsen2, and Michael Bonitz2 — 1University of Birmingham, United Kingdom — 2ITAP, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel
Dusty plasmas are an excellent laboratory for studying many body physics [1]. Selective control over the kinetic temperature of the dust particle is required in order to investigate phenomena such as melting and heat transport. This control is achieved, e.g. by acceleration of single dust grains by the radiation pressure of moving laser spots [2]. We can simulate these experiments by means of Langevin Molecular Dynamics [3].
If the power input is confined to the central region, one can investigate the heat transport through the dust cluster which is recently of high intent [4]. Here, we present theoretical results. The radial temperature profiles from simulations with different heating powers are fit by modified Bessel functions as solution of the heat transport equation including losses to the neutral gas. The thermal conductivity k determined from the fit is found to be proportional to the particle density but independent of the power input. Surprisingly, the thermal conductivity appears to be unaffected by the cluster’s transition from a solid-like to a liquid-like state.
[1] M. Bonitz et al., Rep. Prog. Phys. 73, 066501 (2010)
[2] J. Schablinski et al., Phys. Plasmas 19, 013705 (2012)
[3] H. Thomsen et al., Phys. Plasmas 19, 023701 (2012)
[4] Y. Feng et al., Phys. Rev. E 86, 056403 (2012)