Numerical simulations of compressively driven interstellar turbulence
نویسندگان
چکیده
منابع مشابه
Numerical simulations of compressively driven interstellar turbulence: I. Isothermal gas
Context. Supersonic turbulence is ubiquitous in the interstellar medium and plays an important role in contemporary star formation. Aims. To perform a high-resolution numerical simulation of supersonic isothermal turbulence driven by compressive large-scale forcing and to analyse various statistical properties. Methods. The compressible Euler equations with an external stochastic force field do...
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We present results of a high resolution 3-dimensional numerical simulation of compressively driven supersonic turbulence. A detailed analysis of the fractal mass dimension, which is extracted from data of the density field, yields values of Df ≈ 2.6− 2.7. This is significantly higher than what is usually assumed in the literature (Df ≈ 2.35). However, this value is traditionally obtained by app...
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Recent numerical simulations of the interstellar medium driven by energy input from supernovae and stellar winds indicate that H I clouds can be formed by compression in shock waves and colliding turbulent streams without any help from thermal and gravitational instabilities. The filling factor of the hot phase in these models does not exceed 20–40% at the midplane. The hot gas is involved in a...
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This work presents direct numerical simulations of capillary wave turbulence solving the full three-dimensional Navier-Stokes equations of a two-phase flow. When the interface is locally forced at large scales, a statistical stationary state appears after few forcing periods. Smaller wave scales are generated by nonlinear interactions, and the wave height spectrum is found to obey a power law i...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2008
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200809967