[smd2312]

Hi, I am new to OpenFoam. I have installed openfoam2312 on ubuntu. I am trying to run lid-driven cavity flow. Following are the commands I used after opening ubuntu :

1. openfoam2312
2. cd /usr/lib/openfoam/openfoam2312/tutorials/incompressible/icoFoam/cavity/cavity/
3. blockMesh

After executing above commands, I am getting an error -

--> FOAM FATAL ERROR: (openfoam-2312)
cannot find file "/usr/lib/openfoam/openfoam2312/tutorials/incompressible/icoFoam/cavity/cavity/system/system/controlDict"

    From virtual Foam::autoPtr<Foam::ISstream> Foam::fileOperations::uncollatedFileOperation::readStream(Foam::regIOobject&, const Foam::fileName&, const Foam::word&, bool) const
    in file global/fileOperations/uncollatedFileOperation/uncollatedFileOperation.C at line 626.

Please help me in resolving the above error.

[NotOverUnderated]

1) The error message indicates that you are inside the system directory of your case, you need to be in the root level of the directory.
2) That's not how you're supposed to run openfoam tutorials. You should copy the tutorial to another writeable location and run it.

Here is an example:

mkdir -p $FOAM_RUN # Run this only once
cd $FOAM_RUN # or simply use 'run' without quotes

# copy the tutorial

cp -r $FOAM_TUTORIALS/incompressible/icoFoam/cavity/cavity/ .

cd cavity

# Now, you can run blockMesh
blockMesh

[smd2312]

Thank you! Followed the steps and now can execute blockmesh command without any errors.