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大佬们好,我想效仿图1的方式对螺旋桨进行涡量计算,需要这个涡量的变量,然后网上说使用Paraview中的Gradient Of Unstructured Data Set 命令可以实现变量的导数求导,进而对这个变量进行计算,但是我没找到这个Gradient Of Unstructured Data Set 命令,大佬们这是因为什么,paraview截图如图二所示。求大佬救命。