Diffusion in supersonic, turbulent, compressible flows
Astrophysics
2009-11-07 v1 Chaotic Dynamics
Fluid Dynamics
Abstract
We investigate diffusion in supersonic, turbulent, compressible flows. Supersonic turbulence can be characterized as network of interacting shocks. We consider flows with different rms Mach numbers and where energy necessary to maintain dynamical equilibrium is inserted at different spatial scales. We find that turbulent transport exhibits super-diffusive behavior due to induced bulk motions. In a comoving reference frame, however, diffusion behaves normal and can be described by mixing length theory extended into the supersonic regime.
Cite
@article{arxiv.astro-ph/0302527,
title = {Diffusion in supersonic, turbulent, compressible flows},
author = {Ralf S. Klessen and Doug N. C. Lin},
journal= {arXiv preprint arXiv:astro-ph/0302527},
year = {2009}
}
Comments
11 pages, incl. 5 figures, accepted for publication in Physical Review E (a high-resolution version is available at http://www.aip.de./~ralf/Publications/p21.abstract.html)