基于变分原理的自适应网格技术及其权函数问题研究

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利用两个具有解析解的算例研究基于变分原理的自适应网格技术.结果表明,对运动激波算例,权函数考虑二阶导数项比考虑梯度项更能有效地减小误差;对气旋锋生算例,仅以梯度作为权函数亦不能提高精度,考虑速度场、锋生函数分布的权函数能更合理地安排网格;对照解析解,发现提出的自适应网格技术能明显提高计算精度,在节省内存等方面显示了突出的优点.
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