streamLine.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2015-2022 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
    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::streamLine
 
Group
    grpFieldFunctionObjects
 
Description
    Generates streamline data by sampling a set of user-specified fields along a
    particle track, transported by a user-specified velocity field.
 
    Operands:
    \table
      Operand        | Type  | Location
      input          | -     | -
      output file    | -     | postProcessing/sets/<FO>/<time>/file
      output field   | -     | -
    \endtable
 
Usage
    Minimal example by using \c system/controlDict.functions:
    \verbatim
    streamLineFO
    {
        // Mandatory entries
        type            streamLine;
        libs            (fieldFunctionObjects);
 
        // Mandatory entries
        fields          (<field1> ... <fieldN>);
        setFormat       vtk;
        lifeTime        10000;
        seedSampleSet
        {
            type        uniform;
            axis        x;
            start       (-0.0205 0.0001 0.00001);
            end         (-0.0205 0.0005 0.00001);
            nPoints     100;
        }
 
        // Optional entries
        U               <word>;
        direction       forward;
        cloud           particleTracks;
        bounds          (0.2 -10 -10)(0.22 10 10);
        trackLength     1e-3;
        nSubCycle       1;
        interpolationScheme cellPoint;
 
        // Deprecated
        // trackForward true;
 
        // Inherited entries
        ...
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property     | Description                           | Type | Reqd | Deflt
      type         | Type name: streamLine                 | word |  yes  | -
      libs         | Library name: fieldFunctionObjects    | word |  yes  | -
      U            | Name of tracking velocity field       | word |  no   | U
      fields       | Names of operand fields to sample     | wordList | yes | -
      setFormat    | Type of output data                   | word |  yes  | -
      direction    | Direction (enum) to track             | word |  no   | forward
      lifetime     | Maximum number of particle tracking steps | label | yes | -
      cloud        | Cloud name to use for streamlines     | word |  no  | typeName
      seedSampleSet| Seeding description (see below)       | dict |  yes  | -
      bounds       | Bounding box to trim tracks    | vector pair | no | -
      trackLength  | Tracking segment length              | scalar | no | VGREAT
      nSubCycle    | Number of tracking steps per cell    | label  | no | 1
      interpolationScheme | Interp. scheme for sample   | word | no | cellPoint
    \endtable
 
    Example types for the \c seedSampleSet sub-dict:
    \verbatim
        uniform | uniform particle seeding
        cloud   | cloud of points
        triSurfaceMeshPointSet | points according to a tri-surface mesh
    \endverbatim
 
    Options for the \c setFormat entry:
    \verbatim
        csv
        ensight
        gnuplot
        nastran
        raw
        vtk
        xmgr
    \endverbatim
 
    Options for the \c direction entry:
    \verbatim
        forward
        backward
        bidirectional
    \endverbatim
 
    The inherited entries are elaborated in:
      - \link streamLineBase.H \endlink
 
Note
    When specifying the track resolution, the \c trackLength or \c nSubCycle
    option should be used.
 
SourceFiles
    streamLine.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_functionObjects_streamLine_H
#define Foam_functionObjects_streamLine_H
 
#include "streamLineBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class objectRegistry;
class dictionary;
 
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                         Class streamLine Declaration
\*---------------------------------------------------------------------------*/
 
class streamLine
:
    public functionObjects::streamLineBase
{
    // Private Data
 
        //- Number of subcycling steps
        label nSubCycle_;
 
 
public:
 
    //- Runtime type information
    TypeName("streamLine");
 
 
    // Constructors
 
        //- Construct from name, Time and dictionary
        streamLine
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
        //- No copy construct
        streamLine(const streamLine&) = delete;
 
        //- No copy assignment
        void operator=(const streamLine&) = delete;
 
 
    //- Destructor
    virtual ~streamLine() = default;
 
 
    // Member Functions
 
        //- Read the function-object dictionary
        virtual bool read(const dictionary& dict);
 
        //- Do the actual tracking to fill the track data
        virtual void track();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //