conjugateGradient.H

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    Copyright (C) 2013-2019 FOSS GP
    Copyright (C) 2019 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.
 
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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
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Class
    Foam::conjugateGradient
 
Description
    The Conjugate Gradient formula.
 
    Beta computed from Fletcher-Reeves or Polak-Ribiere approaches.
    Polak-Ribiere seems to misbehave.
    Not tested with line search.
 
SourceFiles
    conjugateGradient.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef conjugateGradient_H
#define conjugateGradient_H
 
#include "updateMethod.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                      Class conjugateGradient Declaration
\*---------------------------------------------------------------------------*/
 
class conjugateGradient
:
    public updateMethod
{
protected:
 
    // Protected data
 
        labelList activeDesignVars_;
        scalarField dxOld_;
        scalarField sOld_;
        label counter_;
        word betaType_;
 
 
    // Protected Member Functions
 
        //- Allocate matrices in the first optimisation cycle
        void allocateFields();
 
        //- Read old info from dict
        void readFromDict();
 
 
private:
 
    // Private Member Functions
 
        //- No copy construct
        conjugateGradient(const conjugateGradient&) = delete;
 
        //- No copy assignment
        void operator=(const conjugateGradient&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("conjugateGradient");
 
 
    // Constructors
 
        //- Construct from components
        conjugateGradient(const fvMesh& mesh, const dictionary& dict);
 
 
    //- Destructor
    virtual ~conjugateGradient() = default;
 
 
    // Member Functions
 
       //- Compute design variables correction
       void computeCorrection();
 
       //- Update old correction. For use when eta has been changed externally
       virtual void updateOldCorrection(const scalarField& oldCorrection);
 
       //- Write old info to dict
       virtual void write();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //