continuityError.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2019-2020 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::continuityError
 
Group
    grpFieldFunctionObjects
 
Description
    Computes local, global and cumulative continuity errors for a flux field.
 
    Local continuity error, \f$ \epsilon_{local} \f$:
    \f[
        \epsilon_{local} = \Delta_t \langle |x| \rangle
    \f]
 
    Global continuity error, \f$ \epsilon_{global} \f$:
    \f[
        \epsilon_{global} = \Delta_t \langle |x| \rangle
    \f]
 
    Cumulative continuity, \f$ \epsilon_{cum} \f$:
    \f[
        \epsilon_{cum} += \epsilon_{global}
    \f]
 
    where
    \vartable
      \Delta_t          | Time-step size
      \langle . \rangle | Cell-volume weighted average operator
      x                 | \f$ \div \phi \f$
      phi               | Flux field
    \endvartable
 
    Operands:
    \table
      Operand        | Type | Location
      input          | -    | -
      output file    | dat  | postProcessing/<FO>/<time>/file
      output field   | -    | -
    \endtable
 
Usage
    Minimal example by using \c system/controlDict.functions:
    \verbatim
    continuityErrorFO
    {
        // Mandatory entries
        type        continuityError;
        libs        (fieldFunctionObjects);
 
        // Optional entries
        phi         <word>;
 
        // Inherited entries
        ...
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property     | Description                        | Type | Reqd  | Deflt
      type         | Type name: continuityError         | word |  yes  | -
      libs         | Library name: fieldFunctionObjects | word |  yes  | -
      phi          | Name of flux field                 | word |  no   | phi
    \endtable
 
    The inherited entries are elaborated in:
      - \link functionObject.H \endlink
      - \link writeFile.H \endlink
 
SourceFiles
    continuityError.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_functionObjects_continuityError_H
#define Foam_functionObjects_continuityError_H
 
#include "Switch.H"
#include "fvMeshFunctionObject.H"
#include "writeFile.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                         Class continuityError Declaration
\*---------------------------------------------------------------------------*/
 
class continuityError
:
    public fvMeshFunctionObject,
    public writeFile
{
protected:
 
    // Protected Data
 
        //- Name of flux field
        word phiName_;
 
        //- Cumulative error
        scalar cumulative_;
 
 
    // Protected Member Functions
 
        //- Output file header information
        virtual void writeFileHeader(Ostream& os);
 
 
public:
 
    //- Runtime type information
    TypeName("continuityError");
 
 
    // Constructors
 
        //- Construct from name, Time and dictionary
        continuityError
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
        //- No copy construct
        continuityError(const continuityError&) = delete;
 
        //- No copy assignment
        void operator=(const continuityError&) = delete;
 
 
    //- Destructor
    virtual ~continuityError() = default;
 
 
    // Member Functions
 
        //- Read the function-object dictionary
        virtual bool read(const dictionary& dict);
 
        //- Execute the function-object operations
        virtual bool execute();
 
        //- Write the function-object results
        virtual bool write();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //