Laboratory astrophysics and non-ideal equations of state: the next challenges for astrophysical MHD simulations |
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| Authors: | Robert L Carver Andrew J Cunningham Adam Frank Patrick Hartigan Robert Coker BH Wilde John Foster Paula Rosen |
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| Institution: | a Rice University, Department of Physics and Astronomy, 6100 Main Street, Houston, TX 77521-1892, United States;b University of Rochester, Department of Physics and Astronomy, Rochester, NY 14627-0171, United States;c Los Alamos National Laboratory, Los Alamos, NM 87545, United States;d Atomic Weapons Establishment (AWE) Aldermaston, Reading Berkshire, RG7 4PR, United Kingdom;e Lawrence Livermore National Laboratory, Livermore, CA 94550, United States |
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| Abstract: | Laboratory astrophysics holds great promise not only as a highly effective validation tool for astrophysical magneto-hydrodynamics (MHD) codes but it also presents a unique challenge for these codes. The high-density plasmas found in these experiments are not well modeled by the ideal equations of state (EOS) found in most astrophysical simulation codes. To solve this problem, we replaced the ideal EOS scheme in an existing MHD code, AstroBEAR, with a non-ideal EOS method and validated our implementation with van der Waals shock tube tests. The improved code is also able to model flows that contain more than one material, as required in laboratory experiments. Simulations of jet experiments performed at the OMEGA Laser reproduce the morphology of the jet much better than when the code used a single material and an ideal EOS. |
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| Keywords: | Laboratory astrophysics Astrophysical jets Non-Ideal EOS Hydrodynamics Simulation Omega Laser |
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