Summary
In search of reliable computational methods for cosmic flow problems, we apply several commonly used algorithms and one new algorithm, to a representative problem in galactic gas dynamics. A careful choice of the algorithm used in a calculation is found to be of the utmost importance in obtaining reliable results. Two methods most commonly employed in astronomy (the Beam scheme and FCT methods) prove to be highly unsuitable for our test problem. The penalty in programming effort and computer time per grid point required for the best second-order accurate codes tested is more than offset by the improvement in accuracy obtained and the possibility to reduce the number of points in a grid.
The National Radio Astronomy Observatory is operated by Associated Universities, Inc., under contract with the National Science Foundation.
This work was supported under NASA Contract No. NAS1-14472 while the author was in residence at ICASE, NASA Langley Research Center, Hampton, VA 23665
This work was supported in part by the National Science Foundation under Grant AST-7909935; partial support was also recieved under NASA Contract No. NAS1-15810 while the author was in residence at ICASE, NASA Langley Research Center, Hampton, VA
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van Albada, G.D., van Leer, B., Roberts, W.W. (1997). A Comparative Study of Computational Methods in Cosmic Gas Dynamics. In: Hussaini, M.Y., van Leer, B., Van Rosendale, J. (eds) Upwind and High-Resolution Schemes. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60543-7_6
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DOI: https://doi.org/10.1007/978-3-642-60543-7_6
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