The constant heat capacity hacked thermo in surfaceFilmModels and the
corresponding transfer terms in Lagrangian have been replaced by the standard
OpenFOAM rhoThermo which provides a general handling of thermo-physical
properties, in particular non-constant heat capacity. Further rationalisation
of liquid and solid properties has also been undertaken in support of this work
to provide a completely consistent interface to sensible and absolute enthalpy.
Now for surfaceFilmModels the thermo-physical model and properties are specified
in a constant/<region>/thermophysicalProperties dictionary consistent with all
other types of continuum simulation.
This significantly rationalises, simplifies and generalises the handling of
thermo-physical properties for film simulations and is a start at doing the same
for Lagrangian.
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