[TODO] Data post processing

[cfkawa]

Description of item

OpenFOAM directly provides post-processing through the command line. Post-processing can be done in the conventional manner (after all the data is generated) or run-time post-processing may be done. time, vorticity, turbulence (etc), velocity, will all be quantities that we want to consider and store.

Correspondence: @cfkawa

Note to the creator: please name the branch according to <branch_type>/<your_name>/<issue_number(s)_that_you_address>
If you address more than 1 issue with one branch, write each number with an underscore like the following: "chore/doruk/1_2"
But don't try to adress too many issues with a single branch!