Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1867989 | Physics Letters A | 2007 | 5 Pages |
Abstract
Two-dimensional numerical simulations of a subsonic interstellar medium fluid, characterized by a low turbulent Mach number (MË<1), demonstrate a self-consistent generation of nonlinear turbulent flows in a hydrodynamic regime. Dynamically weak compressive effects are associated with passively convected thermal fluctuations and these enhance the rate of selective decay. Turbulent relaxation leads to self-organization in thermally dominated velocity fluctuations with the formation of large-scale steady state coherent flows via an inverse cascade mechanism. In agreement with theoretical predictions, thermal and density fluctuations are found to be anti-correlated.
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Authors
Dastgeer Shaikh,