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我在controlDict里面出现添加了#includeFunc mag(U) 用pisoFoam运行后输入postProcess -func "mag(U)"，出现
#includeFunc mag(U)
postProcess -func "mag(U)"
functionObjects::mag mag(U) cannot find required object U of type volScalarField
这该怎么解决
postProcess -func 'maf(U)'
另外你不需要修改controlDict
