I would appreciate knowing how I can convert the cell values given after the OpenFOAM solution into the ones on the grid points. Is there any direct command for such a thing or I should work with the sampling option?
Thanks a lot for your help.
When you open your case using Paraview/paraFoam, then the interpolated fields at the points (nodes) are already computed by Paraview:
Fields with an orange small circle are the point data, while the fields that have an orange cube icon are the data at the cell centers, i.e:
You can also see the values of the fields (points or cell) using the Spreadsheet view and export them as CSV: