A comparative study of computational methods in cosmic gas dynamics
A comparative study of computational methods in cosmic gas dynamics
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DOI：
10.1007/978-3-642-60543-7_6
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发表时间：
1982-04
影响因子：
6.5
通讯作者：
G. D. V. Albada;B. Leer;W. Roberts
中科院分区：
文献类型：
--
作者：
G. D. V. Albada;B. Leer;W. Roberts
为了寻找可靠的宇宙流问题的计算方法，我们将几种常用的算法和一种新的算法应用于银河系气体动力学中的一个典型问题。仔细选择在计算中使用的算法对于获得可靠的结果是至关重要的。事实证明，天文学中最常用的两种方法(波束方案和FCT方法)非常不适合我们的测试问题。所测试的最佳二阶精度代码所需的每网格点的编程工作量和计算机时间的损失被所获得的精度的提高和减少网格中的点数的可能性所抵消。
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.