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运行setFields时报错 Command 'setFields' not found, but can be installed with: sudo apt install openfoam
你的openfoam没有安装成功。运行icoFoam能跑么
运行icoFoam不能跑，要重新安装一遍么
就是这个问题，参照这里的已解决~ https://www.cfd-online.com/Forums/openfoam-installation/229950-icofoam-not-installed.html
