Simulation of Vortex--Dominated Flows Using the FLASH Code

Details Simulation of Vortex--Dominated Flows Using the FLASH Code Simulation of Vortex--Dominated Flows Using the FLASH Code

2004-03-04

arxiv.org/abs/astro-ph/0403109v1

Astronomy and Astrophysics

Astrophysics

11 pages, to appear in the proceedings of the conference on "Adaptive Mesh Refinement - Theory and Applications", editors Toma

Scientific paper

We compare the results of two--dimensional simulations to experimental data obtained at Los Alamos National Laboratory in order to validate the FLASH code. FLASH is a multi--physics, block--structured adaptive mesh refinement code for studying compressible, reactive flows in various astrophysical environments. The experiment involves the lateral interaction between a planar Ma=1.2 shock wave with a cylinder of gaseous sulfur hexafluoride (SF$_6$) in air. The development of primary and secondary flow instabilities after the passage of the shock, as observed in the experiments and numerical simulations, are reviewed and compared. The sensitivity of numerical results to several simulation parameters are examined. Computed and experimentally measured velocity fields are compared. Motivation for experimental data in planes parallel to the cylinder axis is provided by a speculative three--dimensional simulation.

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