Patch contributed by Juho Peltola, VTT.

Resolves patch request https://bugs.openfoam.org/view.php?id=2521

Created a base-class from contactAngleForce from which the
distributionContactAngleForce (for backward compatibility) and the new
temperatureDependentContactAngleForce are derived:

Description
    Temperature dependent contact angle force

    The contact angle in degrees is specified as a \c Function1 type, to
    enable the use of, e.g.  contant, polynomial, table values.

See also
    Foam::regionModels::surfaceFilmModels::contactAngleForce
    Foam::Function1Types

SourceFiles
    temperatureDependentContactAngleForce.C

Patch contributed by Juho Peltola, VTT
Resolves patch request https://bugs.openfoam.org/view.php?id=2446

to handle the size of bubbles created by boiling.  To be used in
conjunction with the alphatWallBoilingWallFunction boundary condition.

The IATE variant of the wallBoiling tutorial case is provided to
demonstrate the functionality:

tutorials/multiphase/reactingTwoPhaseEulerFoam/RAS/wallBoilingIATE

Contributed by Juho Peltola, VTT

Notable changes:

    1. The same wall function is now used for both phases, but user must
       specify phaseType ‘liquid’ or ‘vapor’

    2. Runtime selectable submodels for:
       - wall heat flux partitioning between the phases
       - nucleation site density
       - bubble departure frequency
       - bubble departure diameter

    3. An additional iteration loop for the wall boiling model in case
       the initial guess for the wall temperature proves to be poor.

The wallBoiling tutorial has been updated to demonstrate this new functionality.

Code and tutorial case provided by Juho Peltola

The old separate incompressible and compressible libraries have been removed.

Most of the commonly used RANS and LES models have been upgraded to the
new framework but there are a few missing which will be added over the
next few days, in particular the realizable k-epsilon model.  Some of
the less common incompressible RANS models have been introduced into the
new library instantiated for incompressible flow only.  If they prove to
be generally useful they can be templated for compressible and
multiphase application.

The Spalart-Allmaras DDES and IDDES models have been thoroughly
debugged, removing serious errors concerning the use of S rather than
Omega.

The compressible instances of the models have been augmented by a simple
backward-compatible eddyDiffusivity model for thermal transport based on
alphat and alphaEff.  This will be replaced with a separate run-time
selectable thermal transport model framework in a few weeks.

For simplicity and ease of maintenance and further development the
turbulent transport and wall modeling is based on nut/nuEff rather than
mut/muEff for compressible models so that all forms of turbulence models
can use the same wall-functions and other BCs.

All turbulence model selection made in the constant/turbulenceProperties
dictionary with RAS and LES as sub-dictionaries rather than in separate
files which added huge complexity for multiphase.

All tutorials have been updated so study the changes and update your own
cases by comparison with similar cases provided.

Sorry for the inconvenience in the break in backward-compatibility but
this update to the turbulence modeling is an essential step in the
future of OpenFOAM to allow more models to be added and maintained for a
wider range of cases and physics.  Over the next weeks and months more
turbulence models will be added of single and multiphase flow, more
additional sub-models and further development and testing of existing
models.  I hope this brings benefits to all OpenFOAM users.

Henry G. Weller