Yeah that is what I will be doing have to rewrite it into this App form I am not sure if that is the language I should use, he has also rewritten pimpleFoam into that form, boussinesqBuoyantFoam and then he combined his electromagnetics calculation with boussinesqBouyantFoam, so therefore I am thinking of just rewriting chtMultiRegion foam into his form and then combine it