volRegion.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2016 OpenFOAM Foundation
    Copyright (C) 2016-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
Class
    Foam::functionObjects::volRegion
 
Group
    grpFieldFunctionObjects
 
Description
    Volume (cell) region selection class.
 
    The adjustments for mesh changes have been implemented with a lazy
    evaluation, to avoid unnecessary recalculation until the values are
    actually required. The update() method is used to ensure the cache
    values are up-to-date.
 
    Examples of function object specification:
    \verbatim
    volRegion0
    {
        .
        .
        regionType      cellZone;
        name            c0;
        .
        .
    }
 
    volRegionAll
    {
        .
        .
        regionType      all;
        .
        .
    }
    \endverbatim
 
Usage
    \table
        Property     | Description                          | Required | Default
        regionType   | Selection type: all/cellSet/cellZone | no | all
        name         | Name of cellSet/cellZone if required | conditional |
    \endtable
 
See also
    Foam::functionObject
 
SourceFiles
    volRegion.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_functionObjects_volRegion_H
#define Foam_functionObjects_volRegion_H
 
#include "writeFile.H"
#include "Enum.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class fvMesh;
class polyMesh;
class mapPolyMesh;
 
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                          Class volRegion Declaration
\*---------------------------------------------------------------------------*/
 
class volRegion
{
public:
 
    // Public Data Types
 
        //- Region type enumeration
        enum regionTypes : char
        {
            vrtAll = 0,         
            vrtCellSet,         
            vrtCellZone         
        };
 
        //- Region type names
        static const Enum<regionTypes> regionTypeNames_;
 
 
private:
 
    // Private Member Data
 
        //- Reference to the volume mesh
        const fvMesh& volMesh_;
 
        //- The cell ids, from cellSet or multiple cell zones
        labelList cellIds_;
 
        //- Region IDs (zone ID, ...)
        labelList regionIDs_;
 
        //- Cached total number of cells selected
        label nCells_;
 
        //- Cached total selection volume
        scalar V_;
 
        //- Flag to indicate whether the volRegion requires updating
        bool requireUpdate_;
 
 
    // Private Member Functions
 
        //- Update cellIds, nCells, volume
        void calculateCache();
 
 
protected:
 
    // Protected Data
 
        //- Region type
        regionTypes regionType_;
 
        //- Region name (cellSet, cellZone, ...)
        wordRe regionName_;
 
 
    // Protected Member Functions
 
        //- Use all cells, not the cellIDs
        inline bool useAllCells() const noexcept;
 
        //- Output file header information
        void writeFileHeader(const writeFile& wf, Ostream& file) const;
 
 
public:
 
    //- Run-time type information
    TypeName("volRegion");
 
 
    // Constructors
 
        //- Construct from fvMesh and dictionary
        volRegion(const fvMesh& mesh, const dictionary& dict);
 
 
    //- Destructor
    virtual ~volRegion() = default;
 
 
    // Member Functions
 
        //- The region type
        inline regionTypes regionType() const noexcept;
 
        //- Return the local list of cell IDs.
        //  Empty or invalid for 'all'
        const labelList& cellIDs() const;
 
        //- Return the total number of cells selected in the region
        inline label nCells() const;
 
        //- Return total volume of the selected region
        inline scalar V() const;
 
        //- Update the cached values as required
        //  \return False if the values were already up to date
        bool update();
 
 
        //- Read from dictionary
        virtual bool read(const dictionary& dict);
 
        //- Update for changes of mesh
        virtual void updateMesh(const mapPolyMesh&);
 
        //- Update for mesh point-motion
        virtual void movePoints(const polyMesh&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "volRegionI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //