MapFieldConstraint.H

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    Copyright (C) 2023 OpenCFD Ltd.
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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
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    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::fv::MapFieldConstraint
 
Group
    grpFvOptionsConstraints
 
Description
    The \c MapFieldConstraint constrains values of given fields of \c Type
    with a source field from an external mesh, where
    \c <Type>={scalar,vector,sphericalTensor,symmTensor,tensor}.
    Optionally, the source field can be translated and/or rotated as a function
    of time.
 
Usage
    Minimal example by using \c constant/fvOptions:
    \verbatim
    <Type>MapFieldConstraint1
    {
        // Mandatory entries
        type                <Type>MapFieldConstraint;
        field               <word>;
        srcMesh             <fileName>;
        mapMethod           <word>;
 
        // Optional entries
        consistent          <bool>;
        patchMapMethod      <word>;
        transform
        {
            // Optional entries
            position    <Function1<vector>>;
            origin      <vector>;
 
            direction   <Function1<vector>>;
            normal      <vector>;
        }
 
        // Conditional entries
 
            // when consistent=false
            patchMap        <HashTable<word>>;  // (<patchSrc> <patchTgt>);
            cuttingPatches  <wordList>;  // (<patchTgt1> ... <patchTgtN>);
 
        // Inherited entries
        ...
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property  | Description                           | Type | Reqd | Deflt
      type      | Type name: <Type>MapFieldConstraint | word | yes  | -
      field     | Name of operand field                 | word | yes  | -
      srcMesh  | Directory path to mesh to map from  | fileName | yes | -
      mapMethod | Mapping method                        | word | yes  | -
      consistent | Flag to determine if meshes have consistent boundaries <!--
                -->                                     | bool | no   | false
      patchMapMethod | Name of patch-map method         | word | no   | -
      patchMap     | Coincident source/target patches in two cases   <!--
                   -->                           | wordHashTable | no | -
      cuttingPatches | Target patches cutting the source domain      <!--
                   -->                                | wordList | no | -
      transform    | Transform settings for source mesh points       <!--
                   -->                                  | dict | no   | -
      position     | Position of source mesh as a function of time   <!--
                   -->                     | Function1<vector> | no | -
      direction    | Direction of source mesh as a function of time  <!--
                   -->                     | Function1<vector> | no | -
      origin       | Origin of source mesh              | vector | no | -
      normal       | Normal of reference plane representing source mesh <!--
                   -->                                  | vector | no | -
    \endtable
 
    The inherited entries are elaborated in:
      - \link fvOption.H \endlink
      - \link Function1.H \endlink
 
SourceFiles
    MapFieldConstraint.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_fv_MapFieldConstraint_H
#define Foam_fv_MapFieldConstraint_H
 
#include "fvOption.H"
#include "fvMesh.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class meshToMesh;
template<class Type> class Function1;
 
namespace fv
{
 
/*---------------------------------------------------------------------------*\
                       Class MapFieldConstraint Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class MapFieldConstraint
:
    public fv::option
{
    // Private Classes
 
        class transform
        {
            // Private Data
 
                //- Position of source mesh as a function of time
                autoPtr<Function1<point>> positionPtr_;
 
                //- Direction of source mesh as a function of time
                autoPtr<Function1<point>> directionPtr_;
 
                //- Cached points of source mesh
                pointField points_;
 
                //- Origin of source mesh
                point origin_;
 
                //- Normal of reference plane representing source mesh
                vector normal_;
 
                //- Flag to deduce if transformation is active
                bool active_;
 
 
        public:
 
            // Constructors
 
                //- Default construct
                transform();
 
                //- No copy construct
                transform(const transform&) = delete;
 
                //- No copy assignment
                void operator=(const transform&) = delete;
 
 
            // Member Functions
 
            // Access
 
                //- Return flag to deduce if transformation is active
                bool isActive() const noexcept { return active_; }
 
 
            // Evaluation
 
                //- Translate source mesh as a function of time
                void translate(refPtr<fvMesh>& srcMeshPtr, const scalar time);
 
                //- Rotate source mesh as a function of time
                void rotate(refPtr<fvMesh>& srcMeshPtr, const scalar time);
 
 
            // I-O
 
                //- Initialize the class members
                bool initialize(const fvMesh& srcMesh, const dictionary& dict);
        };
 
 
    // Private Data
 
        //- Transformation settings for source mesh
        transform transform_;
 
        //- Time database for source mesh to map from
        autoPtr<Time> srcTimePtr_;
 
        //- Source mesh to map from
        refPtr<fvMesh> srcMeshPtr_;
 
        //- Mesh-to-mesh interpolation from source mesh to target mesh
        autoPtr<meshToMesh> interpPtr_;
 
        //- List of coincident source/target patches in two cases
        HashTable<word> patchMap_;
 
        //- Set of cells to apply source to
        labelList cells_;
 
        //- List of names of target patches cutting the source domain
        wordList cuttingPatches_;
 
        //- Name of map method
        word mapMethodName_;
 
        //- Name of patch-map method
        word patchMapMethodName_;
 
        //- Flag to determine if meshes have consistent boundaries
        bool consistent_;
 
 
    // Private Member Functions
 
        //- Helper function to set source mesh
        //  Fetch fvMesh from a given Time database
        //  Otherwise, load it from disk and cache it to the database
        void setSourceMesh
        (
            refPtr<fvMesh>& meshRef,
            const autoPtr<Time>& runTimePtr
        );
 
        //- Helper function to create the mesh-to-mesh interpolation
        void createInterpolation
        (
            const fvMesh& srcMesh,
            const fvMesh& tgtMesh
        );
 
        //- Return requested field from object registry
        //- otherwise read it from disk and register it to the object registry
        template<class VolFieldType>
        VolFieldType& getOrReadField
        (
            const fvMesh& thisMesh,
            const word& fieldName
        ) const;
 
        //- Return the local cell indices of the target mesh
        labelList tgtCellIDs() const;
 
 
public:
 
    //- Runtime type information
    TypeName("MapFieldConstraint");
 
 
    // Constructors
 
        //- Construct from components
        MapFieldConstraint
        (
            const word& name,
            const word& modelType,
            const dictionary& dict,
            const fvMesh& mesh
        );
 
        //- No copy construct
        MapFieldConstraint(const MapFieldConstraint&) = delete;
 
        //- No copy assignment
        void operator=(const MapFieldConstraint&) = delete;
 
 
    //- Destructor
    virtual ~MapFieldConstraint() = default;
 
 
    // Member Functions
 
        //- Read source dictionary
        virtual bool read(const dictionary& dict);
 
        //- Set value on field
        virtual void constrain(fvMatrix<Type>& eqn, const label);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fv
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "MapFieldConstraint.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //