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Numerical Models of Turbulence in Isothermal and Thermally Bistable Interstellar Gas

In: High Performance Computing in Science and Engineering, Garching/Munich 2009

Author

Listed:
  • 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)

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.

Suggested Citation

  • Wolfram Schmidt & Daniel Seifried & Markus Niklaus & Jens C. Niemeyer, 2010. "Numerical Models of Turbulence in Isothermal and Thermally Bistable Interstellar Gas," Springer Books, in: Siegfried Wagner & Matthias Steinmetz & Arndt Bode & Markus Michael Müller (ed.), High Performance Computing in Science and Engineering, Garching/Munich 2009, pages 371-382, Springer.
    • Handle: RePEc:spr:sprchp:978-3-642-13872-0_31
    DOI: 10.1007/978-3-642-13872-0_31
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