Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1745

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1636

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1157

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1741

pairPatchAgglomeration: Do not use the result agglomeratePatch if the return indicates it is not valid
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1157

Applying patches provided by Timo Niemi
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1636

Multi-species, mass-transfer and reaction support and multi-phase
structure provided by William Bainbridge.

Integration of the latest p-U and face-p_U algorithms with William's
multi-phase structure is not quite complete due to design
incompatibilities which needs further development.  However the
integration of the functionality is complete.

The results of the tutorials are not exactly the same for the
twoPhaseEulerFoam and reactingTwoPhaseEulerFoam solvers but are very
similar.  Further analysis in needed to ensure these differences are
physical or to resolve them; in the meantime the twoPhaseEulerFoam
solver will be maintained.

if it depends on the availability of the physical properties of both
phases as the construction of the phase-system may not be complete.

Resolves additional bug-report http://www.openfoam.org/mantisbt/view.php?id=1544

Resolves additional request in http://www.openfoam.org/mantisbt/view.php?id=1544

twoPhaseEulerFoam/interfacialModels/heatTransferModels/sphericalHeatTransfer: new heat-transfer model

Model which applies an analytical solution for heat transfer from the
surface of a sphere to the fluid within the sphere.

Provided by William Bainbridge

This is necessary to guarantee consistency between the residualAlpha
used for drag and buoyancy in a multi-phase system

to allow combustionModel to be used with more general forms of multi-phase

by naming fields including the phase name is needed

i.e. without the group suffix.

Patch provided by William Bainbridge

Applied as a correction pre-factor to the viscosity obtained from a
run-time selectable base-model.

filmViscosityModel/thixotropicViscosity/thixotropicViscosity: Remove the spurious mask and correct the blending

Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1730

Also removed the underlying structure for "alwaysApply" from fvOption

fixedTemperatureConstraint,effectivenessHeatExchangerSource: Set the field name to that of the energy
field from which the temperature is obtained

Removes the need for the 'alwaysApply' hack.

limitTemperature: Set the field name to that of the energy field from which the temperature is obtained
Removes the need for the 'alwaysApply' hack.

writeData is not yet completely consistent with read.

by introducing rational base-classes rather than using the hideous
'switch' statement.  Further rationalization of the cell-selection
mechanism will be implemented via an appropriate class hierarchy to
replace the remaining 'switch' statement.

Mesh-motion is currently handled very inefficiently for cellSets and not
at all for inter-region coupling.  The former will be improved when the
cell-selection classes are written and the latter by making the
meshToMesh class a MeshObject after it has been corrected for mapFields.

fvOptions does not have the appropriate structure to support MRF as it
is based on option selection by user-specified fields whereas MRF MUST
be applied to all velocity fields in the particular solver.  A
consequence of the particular design choices in fvOptions made it
difficult to support MRF for multiphase and it is easier to support
frame-related and field related options separately.

Currently the MRF functionality provided supports only rotations but
the structure will be generalized to support other frame motions
including linear acceleration, SRF rotation and 6DoF which will be
run-time selectable.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1720

SIMPLEC (SIMPLE-consistent) is selected by setting "consistent" option true/yes:

SIMPLE
{
    nNonOrthogonalCorrectors 0;
    consistent yes;
}

which relaxes the pressure in a "consistent" manner and additional
relaxation of the pressure is not generally necessary.  In addition
convergence of the p-U system is better and reliable with less
aggressive relaxation of the momentum equation, e.g. for the motorbike
tutorial:

relaxationFactors
{
    equations
    {
        U               0.9;
        k               0.7;
        omega           0.7;
    }
}

The cost per iteration is marginally higher but the convergence rate is
better so the number of iterations can be reduced.

The SIMPLEC algorithm also provides benefit for cases with large
body-forces, e.g. SRF, see tutorials/incompressible/SRFSimpleFoam/mixer
and feature request http://www.openfoam.org/mantisbt/view.php?id=1714

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1717