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我正在做加热管道空气流动例子的DNS,有新旧两个算例,其中旧算例的残差情况是:
然后我把中间结果文件copy到新算例里面,接着继续跑,然后现在残差一直都比较水平:
但是量级还是有点高,看了平均壁温,也没有达到均匀和期望效果。
我目前用的是基于buoyantPimpleFoam改编的求解器,设置成piso模式来跑,内迭代两次。U跟h的离散格式是QUICK.
不知道出现这种情况暗示着什么?有什么办法可以改变这种残差一直水平的情况呢?谢谢!