Select using the optional

    consistent true;

setting in the PIMPLE dictionary of fvSolution.

This option is generally only beneficial for cases run in PIMPLE-mode
with a large maximum Courant number.

See tutorials/compressible/rhoSimpleFoam/squareBend

SIMPLE
{
    nNonOrthogonalCorrectors 0;
    rhoMin          0.1;
    rhoMax          1.0;
    transonic       yes;
    consistent      yes;

    residualControl
    {
        p               1e-3;
        U               1e-4;
        e               1e-3;

        // possibly check turbulence fields
        "(k|epsilon|omega)" 1e-3;
    }
}

relaxationFactors
{
    fields
    {
        p               1;
        rho             1;
    }
    equations
    {
        p               1;
        U               0.9;
        e               0.9;
        k               0.9;
        epsilon         0.9;
    }
}

e.g. in tutorials/compressible/rhoPimpleFoam/ras/angledDuctLTS

PIMPLE
{
    momentumPredictor   yes;
    transonic           no;
    nOuterCorrectors    50;
    nCorrectors         1;
    nNonOrthogonalCorrectors 0;
    consistent          yes;

    rhoMin          0.5;
    rhoMax          2.0;

    residualControl
    {
        "(U|k|epsilon)"
        {
            relTol          0;
            tolerance       0.0001;
        }
    }

    turbOnFinalIterOnly off;
}

relaxationFactors
{
    fields
    {
        "p.*"           0.9;
        "rho.*"         1;
    }
    equations
    {
        "U.*"           0.9;
        "h.*"           0.7;
        "(k|epsilon|omega).*" 0.8;
    }
}

Select LTS via the ddtScheme:

    ddtSchemes
    {
        default         localEuler rDeltaT;
    }

The LTS algorithm is currently controlled with the standard settings in
controlDict, e.g.:

    maxCo           0.5;
    maxDeltaT       2e-8;

with the addition of the optional rDeltaT smoothing coefficient:

    rDeltaTSmoothingCoeff 0.02;

which defaults to 0.02.

    ddtSchemes
    {
        default         localEuler rDeltaT;
    }

LTS is selected by the ddt scheme e.g. in the
tutorials/multiphase/interFoam/ras/DTCHull case:

ddtSchemes
{
    default         localEuler rDeltaT;
}

LTSInterFoam is no longer needed now that interFoam includes LTS
support.

to support any number of phases

correction in MovingPhaseModel<BasePhaseModel>::correct()

Patches provided by Timm Severin
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1764

to correspond to the phase dilatation rate.

to support any number of phases

to be phase-symmetric so that the results are independent of which
phase-fraction is solved.

    //- Return the set of times selected based on the argList options
    //  including support for \b -newTimes in which times are selected
    //  if the file <fName> does not exist in the time directory.
    //  Also set the runTime to the first instance or the
    //  \c constant/ directory if no instances are specified or available
    static instantList select
    (
        Time& runTime,
        const argList& args,
        const word& fName
    );

This is experimental functionality and currently on test in the yPlus
post-processing utility.

to support laminar simulations in the new framework.

Unfortunately this allows LES models to be instantiated although they
are not compatible with steady-state simulations.

Select LTS via the ddtScheme:

ddtSchemes
{
    default         localEuler rDeltaT;
}

The LTS algorithm is controlled with the standard settings in
controlDict, e.g.:

maxCo           0.5;
maxDeltaT       2e-8;

with the addition of the optional rDeltaT smoothing coefficient:

rDeltaTSmoothingCoeff 0.02;

which defaults to 0.02.

For cases with reasonably uniform meshes like the forwardStep tutorial
LTS does not provide much benefit but for cases with large variation in
cell-size like the biconic25-55Run35 tutorial LTS provides significant
speed-up to convergence particularly if started from uniform conditions.

Reverted changes proposed in
http://openfoam.org/mantisbt/view.php?id=1548 as it adversely affects
fixed-value BCs and is formulated to fix an issue with an unphysical
case.  Further analysis of the handling of fixed pressure outlet
conditions as the Mach number approaches 1 is required.

Now consistent with the way the Courant number is calculated for other solvers

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1748

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1749

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.

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

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