source directionalPressureGradientExplicitSource

ENH: isoSurfaceTopo: replacement for isoSurfaceCell.

See merge request OpenFOAM-plus!224

ENH: update handling of versioning and make control (issue #1010)

See merge request OpenFOAM-plus!222

- now placed under postProcessing/checkMesh and postProcessing/checkAMI,
  respectively.

  Output files are now also tagged with the id of the patch, in case
  there are multiple AMI patches in use.

- the problem occurred when running the writers in a parallel solver
  or utility but requesting output on the master only.

  Adjusted the logic to avoid globalIndex for these cases.
  Previously the if (parallel_) checks were happening later, after the
  globalIndex had already been created.

- the previous 9.0.0 was a premature change from ParaView 5.5 and
  still will not be reached for a while

- use cellCentres() instead of volField equivalent for vtk conversion

- make looping variables more consistent

- centralize the transcription of OpenFOAM -> vtk tuples

- now consider options '-hostRoots', '-roots' to be advanced options
  that don't need to be in the cache

- The usage claimed '-output=', but was using '--output=' for the
  output file.  Rectify to use single dash as documented.

ENH: momentum field function (issue #1105)

See merge request OpenFOAM-plus!223

    Calculates linear/angular momentum, reporting integral values
    and optionally writing the fields.

Example
    momentum1
    {
        type        momentum;
        libs        ("libfieldFunctionObjects.so");
        ...
        writeMomentum   yes;
        writeVelocity   no;

        cylindrical     true;
        origin  (0 0 0);
        e1      (1 0 0);
        e3      (0 0 1);
    }

- eg for foamVersion.H

Reducing running time in controlDict

The freestreamFvPatchField previously employed a fixed value when supplying
the inlet values.  This commit extends the BC so that users can use another
patch to supply the values via the new freestreamBC entry, e.g. to set the
velocity to an atmospheric boundary layer profile:

    inlet
    {
        type            freestream;
        freestreamBC
        {
            type            atmBoundaryLayerInletVelocity;
            flowDir         (1 0 0);
            zDir            (0 0 1);
            Uref            20;
            Zref            20;
            z0              uniform 0.1;
            zGround         uniform 935;
        }
    }

The earlier specification is also maintained for backwards compatibility, e.g.

    inlet
    {
        type            freestream;
        freestreamValue uniform (300 0 0);
    }

- provide default WM_DIR if not already set, to improve robustness if a
  reduced environment is used

- add etc/ to WM_PROJECT_SITE search. This makes the site directory
  structure consistent with the OpenFOAM structure.
  Eg,

      WM_PROJECT_SITE/etc/..
      WM_PROJECT_SITE/bin/..
      WM_PROJECT_SITE/platforms/..

- Don't set/export WM_OSTYPE.  The default is POSIX and is properly
  defaulted throughout, including in CMakeLists-OpenFOAM.txt (also for
  Catalyst)

- Use the OPENFOAM define (eg, 1806, 1812), which normally corresponds
  to a major release, to define an API level. This remains consistent
  within a release cycle and means that it is possible to manage
  several sub-versions and continue to have a consistent lookup.

  The current API value is updated automatically during the build
  and cached as meta data for later use, even when the wmake/ directory
  is missing or OpenFOAM has not yet be initialized.

  The version information reported on program start or with -help
  usage adjusted to reflect this. The build tag from git now also
  carries the date as being more meaningful to trace than a hash
  value.

- Update etc/bashrc and etc/cshrc to obtain the project directory
  directly instead of via its prefix directory. The value obtained
  corresponds to an absolute path, from which the prefix directory
  can be obtained.

  The combination of these changes removes the reliance on any
...

- Uses the user-specified value for outputTemperature:

  {
      type  externalCoupledTemperature;
      outputTemperture  fluid;  // or wall;
  }

  Otherwises uses 'wall' as a default (for compatibility) and emits a
  warning.

  The T.out header now reflects the type of output. Eg,

     # Values: area Tfluid qDot htc

- tutorials based on squareBend used Default_Boundary_Region explicitly
  defined since they predated the defaultPatch renaming (2008).
  The name 'Default_Boundary_Region' was for convenience as the default
  name when converting to PROSTAR or CCM formation, but can now be
  changed to something more generic.

- define wall boundary conditions for squareBend using a general regex
  to allow future splitting of wall types by name.

- check if the first argument corresponds to an OpenFOAM value for
  'true' (as per Switch).
  True == 't', 'y', 'true', 'yes', 'on'. Everything else is not true.

- when the first argument is '-dict', it initializes the value
  with a query via foamDictionary.
  Eg,
       isTrue -dict mydict -entry parallel

   ==> value=$(foamDictionary mydict -entry parallel -value)
       isTrue $value

   a missing entry is silently treated as false.

ENH: add getNumberOfPatchFaces function in RunFunctions

- simple extraction of nFaces from boundary file for given patch/region

- append the commit hash value with the commit date when creating
  the build string information and drop the version prefix.

  This provides an immediate overview of when the code was last
  changed. The prefixed version information can be dropped from
  the build string, since it is readily available in other forms.

- this splits a larger changeset for a gradual implementation

- was PREFIX/site, now PROJECT/site

  This avoids several issues when installing OpenFOAM in clusters
  without an intermediate OpenFOAM-specific installation prefix.

  The 'site' directory may have a reserved meaning in these situations
  and it is undesirable to 'leak' upwards into the parent directory to
  look for configuration files.

  Placing the default within the project directory avoids this.
  Alternative locations can be given via the WM_PROJECT_SITE variable.

- comments in bashrc, cshrc.
- about controlDict names for allowSystemOperations