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力学学报  2015 

使用时间插值的特征线法在光滑粒子法拉氏边界条件中的应用

DOI: 10.6052/0459-1879-14-412, PP. 830-838

Keywords: 时间插值,特征线法,无反射边界条件,拉氏边界条件,光滑粒子法

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Abstract:

在计算流体动力学的实际应用中无反射边界条件是一个重要的研究课题.文中应用时间插值的特征线方法构造了一种新式的拉氏边界条件,并应用在光滑粒子法中.该方法与使用特征线方法的欧拉边界条件方法相比,不需要区分超声速和亚声速流的不同,并且在入流和出流中具有相同的形式,因而更加简便易行.数值结果表明,采用时间插值特征线法的拉氏边界条件方法在稀疏波、激波以及爆轰波的模拟中都能够得到较好的无反射效果.

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