FRONTIERS IN COMPUTATIONAL ASTROPHYSICS

Particle and Flames in Radiative and Magnetic Flows

October 11-15, 2010
Lyon, France

Contribution of D. Folini

Title

Supersonic turbulence in shock bound slabs

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Abstract

Colliding hypersonic flows and associated turbulence play a decisive role in many astrophysical objects. They contribute, for example, to molecular cloud structure and the initial mass function, the mixing of chemical elements in the galaxy, the X-ray emission of O-stars, differentiation of galactic sheets, appearance of wind-driven structures, or, possibly, to the prompt emission of gamma-ray bursts. The turbulence within such collision zones is studied by means of isothermal numerical simulations in 2D and 3D. Of particular interest is the back coupling between the turbulence within the interaction zone and the geometry of the shocks confining the interaction zone. Differences between 2D and 3D simulations are discussed and the turbulence statistics of 3D slabs are compared to published results from 3D-periodic-box simulations. Related numerical issues like adaptive meshes and convergence are addressed.

Talk