cutCellIso.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2016-2017 DHI
    Copyright (C) 2016-2017 OpenCFD Ltd.
    Copyright (C) 2018 Johan Roenby
    Copyright (c) 2017-2019, German Aerospace Center (DLR)
-------------------------------------------------------------------------------
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::cutCellIso
 
Description
    Class for cutting a cell, celli, of an fvMesh, mesh_, at its intersection
    with an isosurface defined by the mesh point values f_ and the cutValue,
    isoValue_.
 
    Reference:
    \verbatim
        Roenby, J., Bredmose, H. and Jasak, H. (2016).
        A computational method for sharp interface advection
        Royal Society Open Science, 3
        doi 10.1098/rsos.160405
 
        Henning Scheufler, Johan Roenby,
        Accurate and efficient surface reconstruction from volume
        fraction data on general meshes,
        Journal of Computational Physics, 2019,
        doi 10.1016/j.jcp.2019.01.009
 
    \endverbatim
 
    Original code supplied by Johan Roenby, DHI (2016)
 
SourceFiles
    cutCellIso.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef cutCellIso_H
#define cutCellIso_H
 
#include "cutCell.H"
#include "cutFaceIso.H"
#include "fvMesh.H"
#include "surfaceFields.H"
#include "volFields.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                         Class cutCellIso Declaration
\*---------------------------------------------------------------------------*/
 
class cutCellIso
:
    public cutCell
{
    // Private Data
 
        //- Mesh whose cells and faces to cut at their intersection with an
        //  isosurface.
        const fvMesh& mesh_;
 
        //- Cell to cut
        label cellI_;
 
        //- Isofunction values at mesh points. f_size() = mesh_.nPoints().
        scalarField& f_;
 
        //- Cutvalue used to cut cell
        scalar cutValue_;
 
        //- An cutFaceIso object to get access to its face cutting functionality
        cutFaceIso cutFace_;
 
        //- List of face centres for CutFaces
        DynamicList<point> cutFaceCentres_;
 
        //- List of face area vectors for isoCutFaces
        DynamicList<vector> cutFaceAreas_;
 
        //- Storage for subFace edges belonging to isoFace
        DynamicList<DynamicList<point>> isoFaceEdges_;
 
        //- Points constituting the cell-isosurface intersection (isoface)
        DynamicList<point> facePoints_;
 
        //- Face centre of the cutFace
        point faceCentre_;
 
        //- Face normal of the isoface by convention pointing from high to low
        //  values (i.e. opposite of the gradient vector).
        vector faceArea_;
 
        //- Cell centre of the subcell of celli which is "fully submerged", i.e.
        //  where the function value is higher than the isoValue_
        point subCellCentre_;
 
        //- Volume of fully submerged subcell
        scalar subCellVolume_;
 
        //- Volume of Fluid for cellI (subCellVolume_/mesh_.V()[cellI])
        scalar VOF_;
 
        //- A cell status label taking one of the values:
        //
        //   -1: cell is fully below the isosurface
        //    0: cell is cut
        //   +1: cell is fully above the isosurface
        label cellStatus_;
 
 
  public:
 
    // Constructors
 
        //- Construct from fvMesh and a scalarField
        //  Length of scalarField should equal number of mesh points
        cutCellIso(const fvMesh& mesh, scalarField& f);
 
 
    // Member Functions
 
        //- Sets internal values and returns face status
        label calcSubCell(const label cellI, const scalar cutValue);
 
        //- Returns subCellCentre
        const point& subCellCentre() const noexcept
        {
            return subCellCentre_;
        }
 
        //- Returns subCellVolume
        scalar subCellVolume() const noexcept
        {
            return subCellVolume_;
        }
 
        //- Returns the points of the cutting PLICface
        const DynamicList<point>& facePoints();
 
        //- Returns the centre of the cutting PLICface
        const point& faceCentre() const noexcept
        {
            return faceCentre_;
        }
 
        //- Returns the area normal vector of the cutting PLICface
        const vector& faceArea() const noexcept
        {
            return faceArea_;
        }
 
        //- Returns cellStatus
        label cellStatus() const noexcept
        {
            return cellStatus_;
        }
 
        //- Returns volume of fluid value
        scalar VolumeOfFluid() const noexcept
        {
            return VOF_;
        }
 
        //- Returns cutValue
        scalar cutValue() const noexcept
        {
            return cutValue_;
        }
 
        //- Resets internal values
        void clearStorage();
};
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //