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计算一个简单的管道流，进出口用了周期性边界，为了跟文献中的实验数据对比，需要运行在指定的雷诺数下。但是周期性边界是设置pressure gradient,这个值如何确定呢？ 我是用大涡模拟，fluent手册说瞬态不建议用specified mass flow rate。 如果靠手一点点调压力梯度，那要调到猴年马月。😭
我现在想能不能用Rans稳态先算，设置质量流量，然后算稳定后获得压力梯度，再设置到大涡模拟中？
请高手解惑，谢谢