Statistics – Computation
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...108...76v&link_type=abstract
Astronomy and Astrophysics, vol. 108, no. 1, Apr. 1982, p. 76-84.
Statistics
Computation
147
Astronomical Models, Computational Fluid Dynamics, Gas Dynamics, Interstellar Gas, Magnetohydrodynamics, Algorithms, Comparison, Methodology, Root-Mean-Square Errors, Spiral Galaxies
Scientific paper
Many theoretical investigations of fluid flows in astrophysics require extensive numerical calculations. The selection of an appropriate computational method is, therefore, important for the astronomer who has to solve an astrophysical flow problem. The present investigation has the objective to provide an informational basis for such a selection by comparing a variety of numerical methods with the aid of a test problem. The test problem involves a simple, one-dimensional model of the gas flow in a spiral galaxy. The numerical methods considered include the beam scheme, Godunov's method (G), the second-order flux-splitting method (FS2), MacCormack's method, and the flux corrected transport methods of Boris and Book (1973). It is found that the best second-order method (FS2) outperforms the best first-order method (G) by a huge margin.
Roberts William W. Jr.
van Albada G. D.
van Leer Bram
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