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摄动有限差分(PFD)方法的数值计算
Authors
朱力立
胡利民
高智
Publication date
1 January 2003
Publisher
Abstract
利用数值摄动的思想发展了对流扩散(CD)方程的摄动有限差分(PFD)格式,局部线化可获得摄动准确解(PENS)格式。把格式中的指数函数按网格雷诺数的幂级数展开,能够给出PENS格式的各阶近似,即各阶PFD格式。文中构造了一维CD方程的PENS及二阶PFD格式以及二维CD方程的二阶PFD格式,并利用二阶精度的PFD格式计算了一维CD方程、方腔流动和前、后台阶绕流流动等算例。计算给出了准确度较高的数值结果
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 12/02/2018