Numerical Models of Turbulence in Isothermal and Thermally Bistable Interstellar Gas

Wolfram Schmidt (), Daniel Seifried, Markus Niklaus and Jens C. Niemeyer
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Wolfram Schmidt: Universität Göttingen, Institut für Astrophysik
Daniel Seifried: Universität Heidelberg, Institut für Theoretische Astrophysik
Markus Niklaus: Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen, Deutsches Fernerkundungsdatenzentrum
Jens C. Niemeyer: Universität Göttingen, Institut für Astrophysik

A chapter in High Performance Computing in Science and Engineering, Garching/Munich 2009, 2010, pp 371-382 from Springer

Abstract: Abstract We present a novel subgrid scale model that is applicable to highly compressible turbulence. In large eddy simulation of forced supersonic turbulence, this subgrid scale model reduces the bottleneck effect in the turbulence energy spectra and it allows for a prediction of the local rate of turbulent energy dissipation as well as the turbulent pressure. The latter has an impact, for instance, on the gravitational support of turbulent gas and the efficiency of star formation in elaborate large-scale simulations of disk galaxies. We also report results from turbulence simulations with parameterized radiative cooling, in which the effects of thermal processes on the scale of star forming clouds was investigated.

Keywords: Mach Number; Large Eddy Simulation; Star Formation; Effective Pressure; Bottleneck Effect (search for similar items in EconPapers)
Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-13872-0_31

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DOI: 10.1007/978-3-642-13872-0_31

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