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A comparative study of computational methods in cosmic gas dynamicsMany 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.
Document ID
19820047205
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Van Albada, G. D.
(National Radio Astronomy Observatory, Charlottesville, VA; Groningen, Rijksuniversiteit Groningen, Netherlands)
Van Leer, B.
(Institute for Computer Applications in Science and Engineering, Hampton, VA; Leiden, Rijksuniversiteit Leiden, Netherlands)
Roberts, W. W., Jr.
(Institute for Computer Applications in Science and Engineering, Hampton; Virginia, University Charlottesville, VA, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Astronomy and Astrophysics
Volume: 108
Issue: 1, Ap
Subject Category
Astrophysics
Accession Number
82A30740
Funding Number(s)
CONTRACT_GRANT: NAS1-14472
CONTRACT_GRANT: NAS1-15810
CONTRACT_GRANT: NSF AST-79-09935
Distribution Limits
Public
Copyright
Other

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