Laboratory Astrophysics Experiments for Simulation Code Validation: A Case Study |
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Authors: | A C Calder |
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Institution: | (1) Department of Astronomy and Astrophysics, The University of Chicago, 5640 S. Ellis, Chicago, IL, USA;(2) The Center for Astrophysical Thermonuclear Flashes, The University of Chicago, 5640 S. Ellis, Chicago, IL, USA |
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Abstract: | The growing field of Laboratory Astrophysics seeks to study the extreme environments found in many astrophysical events in
the controlled setting of a laboratory. In addition to the opportunity to perform basic research into the nature and properties
of materials in astrophysical environments, laboratory astrophysics experiments serve beautifully for validating calculations
performed by simulation codes designed to model astrophysical phenomena. I present results from our ongoing validation effort
for FLASH, a parallel adaptive-mesh hydrodynamics code for the compressible, reactive flows of astrophysical environments.
The first test case is a laser-driven shock propagating though a multilayer target introducing Rayleigh–Taylor and Richtmyer–Meshkov
fluid instabilities at the material interfaces. The second is an accelerating fluid interface that is subject to the Rayleigh–Taylor
instability. We found good agreement between simulations and experiment for the multilayer target case, but disagreement between
experiment and simulation in the Rayleigh–Taylor case. I discuss our findings and possible reasons for the disagreement. |
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Keywords: | methods numerical hydrodynamics instabilities |
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