streamFunction: Evaluate which coordinate plan the 2D geometry is in filter-out the normal component
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1703

If -rm is specified with the -processor option the selected time
directories are removed from all the processor directories.

twoPhaseEulerFoam: Update only the fixed-value phi patch fields before constructing the pressure eqn
Avoids small continuity error in parallel

to create single layer extrusions with wedge and empty front and back
patches respectively.

refineMesh: Improved command-line argument handling to be more consistent with other OpenFOAM utilities

    Command-line option handling:
    + If -all specified or no refineMeshDict exists or, refine all cells
    + If -dict <file> specified refine according to <file>
    + If refineMeshDict exists refine according to refineMeshDict

    When the refinement or all cells is selected apply 3D refinement for 3D
    cases and 2D refinement for 2D cases.

twoPhaseEulerFoam: In the limit of phase-fraction->0 the velocity is calculated from a force balance

Rather than forcing the dispersed-phase velocity -> the continuous-phase
velocity as the phase-fraction -> 0 the velocity is now calculated from
a balance of pressure, buoyancy and drag forces.  The advantage is now
liquid or particles are not carried out of bubble-column of
fluidised-beds by the fictitious drag caused by forcing the
phase-velocities becoming equal in the limit.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1680

consistent with multiphaseInterFoam and other VoF solvers

nLimiterIter: Number of iterations during limiter construction
    3 (default) is sufficient for 3D simulations with a Courant number 0.5 or so
    For larger Courant numbers larger values may be needed but this is
    only relevant for IMULES and CMULES

smoothLimiter: Coefficient to smooth the limiter to avoid "diamond"
    staggering patters seen in regions of low particle phase-fraction in
    fluidised-bed simulations.

    The default is 0 as it is not needed for all simulations.
    A value of 0.1 is appropriate for fluidised-bed simulations.
    The useful range is 0 -> 0.5.
    Values larger than 0.5 may cause excessive smearing of the solution.

This formulation provides C-grid like pressure-flux staggering on an
unstructured mesh which is hugely beneficial for Euler-Euler multiphase
equations as it allows for all forces to be treated in a consistent
manner on the cell-faces which provides better balance, stability and
accuracy.  However, to achieve face-force consistency the momentum
transport terms must be interpolated to the faces reducing accuracy of
this part of the system but this is offset by the increase in accuracy
of the force-balance.

Currently it is not clear if this face-based momentum equation
formulation is preferable for all Euler-Euler simulations so I have
included it on a switch to allow evaluation and comparison with the
previous cell-based formulation.  To try the new algorithm simply switch
it on, e.g.:

PIMPLE
{
    nOuterCorrectors 3;
    nCorrectors      1;
    nNonOrthogonalCorrectors 0;
    faceMomentum     yes;
}

It is proving particularly good for bubbly flows, eliminating the
staggering patterns often seen in the air velocity field with the
previous algorithm, removing other spurious numerical artifacts in the
velocity fields and improving stability and allowing larger time-steps
For particle-gas flows the advantage is noticeable but not nearly as
pronounced as in the bubbly flow cases.

Please test the new algorithm on your cases and provide feedback.

Henry G. Weller
CFD Direct

Use the new -withFunctionObjects command-line option to execute functionObjects

Pe: Create and write volScalarField in addition to the surfaceScalarField for ease of post-processing
Update handling of turbulence models

To include 0 use the -zeroTime option

For multi-region cases the default location of blockMeshDict is now system/<region name>

If the blockMeshDict is not found in system then the constant directory
is also checked providing backward-compatibility

Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1665

Resolves bug-report http://openfoam.org/mantisbt/view.php?id=1641

Updated tutorials to converge pressure during PIMPLE loop to avoid
phase-fraction unboundedness which limits thermodynamics convergence.

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1649

twoPhaseEulerFoam/interfacialModels/turbulentDispersionModels/noTurbulentDispersion: Corrected dimension of D

twoPhaseEulerFoam/interfacialModels/turbulentDispersionModels/Burns: Corrected sign of the diffusivity