The own OpenFOAM post-processing tools are : postProcess and foamCalc. However, funkyDoCalc is a hell of tools. It makes life easier. If you missed run-time processing by an accident, and you don’t like to redo the simulations you may still can derive some results from saved data in time directories.
Nusslet Number is a dimensionless number and usually reported in heat transfer context. It is defined as: