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你应该看下速度分布云图,没有粘性并不代表不产生旋涡。另外上交有一个圆柱绕流的标准算例,可以在百度文库中找到。不要用Fluent去算势流的东西,势流是格林函数法或者边界元那一套,从离散开始跟fluent的fvm就不是一种东西。这种做法从概念上就有问题,因为laplace方程本人没见过fvm离散的。