Currently these vectors are generated at the same time as the wall-distance field
by the same run-time selected algorithm.  This will be changed so that the wall-reflection
vectors are only generated and stored if required.

When using models which require the wallDist e.g. kOmegaSST it will
request the method to be used from the wallDist sub-dictionary in
fvSchemes e.g.

wallDist
{
    method meshWave;
}

specifies the mesh-wave method as hard-coded in previous OpenFOAM versions.

In preparation for run-time selectable methods

Additional resolution of bug-report http://www.openfoam.org/mantisbt/view.php?id=1474

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1474

Note: non-uniform scaling of a symmetric matrix generates an asymmetric matrix

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1374

To compile with 64bit labels set

WM_LABEL_SIZE=64

in ~/OpenFOAM/dev/prefs.sh

source ~/.bashrc

then Allwmake in OpenFOAM-dev.

This will build into for example OpenFOAM-dev/platforms/linux64ClangDPInt64Opt

If WM_LABEL_SIZE is unset or set to 32:

WM_LABEL_SIZE=32

the build would be placed into OpenFOAM-dev/platforms/linux64ClangDPInt32Opt

Thus both 32bit and 64bit label builds can coexist without problem.

to support improved discretisation in pEqn and implicit treatment in the phase-fraction equation

Provided by Juho Peltola

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1452

driftFluxFoam: separate advection and diffusion for predictor-corrector MULES to reduce operator-splitting error