Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...626..616l&link_type=abstract
The Astrophysical Journal, Volume 626, Issue 1, pp. 616-625.
Astronomy and Astrophysics
Astronomy
2
Hydrodynamics, Methods: Numerical, Radiative Transfer
Scientific paper
This paper presents a validation test of the flux-limited diffusion (FLD) approximation for radiation hydrodynamics in the intermediate optical depth regime. We use an implementation of FLD in the ZEUS-2D astrophysical fluid dynamics code and the results of a set of laser-driven radiative shock experiments. One-dimensional simulations are performed to explore grid spacing and time step convergence without being limited by the available computational resources. The validation test compares two-dimensional simulations with the experimental results. FLD passes the validation test with a qualification: time step convergence seems very demanding for this particular problem. Given this qualification, it is uncertain whether FLD is faster than full-transport or other methods in the intermediate optical depth regime.
Drake Paul R.
Glendinning Gail S.
Leibrandt David R.
Reighard A. B.
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