ENH: Several additions to thinFilm models
1) Changing the faSolution entry nonOrthoCorr to nFilmCorr entry.
This entry specify the number of iterations on the film thickness
Eq which does not correct for laplacian non-orthogonality.
2) Changing laminar turbulent model for the skin friction exerted by
the flow to the film.
3) Adding optional relaxation factors for source terms coming from
the added mass of the lagragian particles into the film such as
rhoSp, pnSp and Usp. Similarly the film pressure (pf) can be
relaxed in the inner loops.
4) Adding optional entries to curvatureSepration injection model.
minimum (fThreshold) force and minimum curvature (minInvR1) for
separation were added to have more control on determining the
points of film separation
ENH: ThermoSurfaceFilm in lagragian to search for finiteArea film models