sensitivitySurfaceIncompressible.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::incompressible::sensitivitySurface
 
Description
    Calculation of adjoint based sensitivities at wall faces
 
    Reference:
    \verbatim
        The computation of the sensitivity derivatives  follows the (E-)SI
        formulation of
 
            Kavvadias, I. S., Papoutsis-Kiachagias, E. M., 
            Giannakoglou, K. C. (2015).
            On the proper treatment of grid sensitivities in continuous adjoint
            methods for shape optimization.
            Journal of computational physics, 301, 1-18.
            https://doi.org/10.1016/j.jcp.2015.08.012
 
        whereas their smoothing based on the computation of the 'Sobolev
        gradient' is derived from
    
            Vassberg J. C., Jameson A. (2006).
            Aerodynamic Shape Optimization Part I: Theoretical Background.
            VKI Lecture Series, Introduction to Optimization and
            Multidisciplinary Design, Brussels, Belgium, 8 March, 2006.
    \endverbatim
 
SourceFiles
    sensitivitySurface.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef sensitivitySurfaceIncompressible_H
#define sensitivitySurfaceIncompressible_H
 
#include "adjointSensitivityIncompressible.H"
#include "shapeSensitivitiesBase.H"
#include "adjointEikonalSolverIncompressible.H"
#include "adjointMeshMovementSolverIncompressible.H"
#include "deltaBoundary.H"
#include "faMesh.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
namespace incompressible
{
 
/*---------------------------------------------------------------------------*\
                      Class sensitivitySurface Declaration
\*---------------------------------------------------------------------------*/
 
class sensitivitySurface
:
    public adjointSensitivity,
    public shapeSensitivitiesBase
{
protected:
 
    // Protected data
 
 
        //- Include surface area in sens computation
        bool includeSurfaceArea_;
 
        //- Include the adjoint pressure term in sens computation
        bool includePressureTerm_;
 
        //- Include the term containing the grad of the stress at the boundary
        bool includeGradStressTerm_;
 
        //- Include the transpose part of the adjoint stresses
        bool includeTransposeStresses_;
 
        //- Use snGrad in the transpose part of the adjoint stresses
        bool useSnGradInTranposeStresses_;
 
        //- Include the term from the deviatoric part of the stresses
        bool includeDivTerm_;
 
        //- Include distance variation in sens computation
        bool includeDistance_;
 
        //- Include mesh movement variation in sens computation
        bool includeMeshMovement_;
 
        //- Include terms directly emerging from the objective function
        bool includeObjective_;
 
        //- Write geometric info for use by external programs
        bool writeGeometricInfo_;
 
        //- Smooth sensitivity derivatives based on the computation of the 
        //- 'Sobolev gradient'
        bool smoothSensitivities_;
 
        autoPtr<adjointEikonalSolver> eikonalSolver_;
 
        autoPtr<adjointMeshMovementSolver> meshMovementSolver_;
 
        // Export face normal and face centre for use by external users
        autoPtr<volVectorField> nfOnPatchPtr_;
        autoPtr<volVectorField> SfOnPatchPtr_;
        autoPtr<volVectorField> CfOnPatchPtr_;
 
 
    // Protected Member Functions
 
        //- Add sensitivities from dSd/db and dnf/db computed at points and
        //- mapped to faces
        void addGeometricSens();
 
        //- Set suffix name for sensitivity fields
        void setSuffixName();
 
        //- Smooth sensitivity derivatives based on the computation of the 
        //- 'Sobolev gradient'
        void smoothSensitivities();
 
        //- Compute the physical smoothing radius based on the average boundary
        //- face 'length'
        scalar computeRadius(const faMesh& aMesh);
 
 
private:
 
    // Private Member Functions
 
        //- No copy construct
        sensitivitySurface(const sensitivitySurface&) = delete;
 
        //- No copy assignment
        void operator=(const sensitivitySurface&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("surface");
 
 
    // Constructors
 
        //- Construct from components
        sensitivitySurface
        (
            const fvMesh& mesh,
            const dictionary& dict,
            incompressibleAdjointSolver& adjointSolver
        );
 
 
    //- Destructor
    virtual ~sensitivitySurface() = default;
 
 
    // Member Functions
 
        //- Read controls and update solver pointers if necessary
        void read();
 
       //- Read dict if changed
       virtual bool readDict(const dictionary& dict);
 
       //- Compute the number of faces on sensitivityPatchIDs_
       void computeDerivativesSize();
 
       //- Accumulate sensitivity integrands
       virtual void accumulateIntegrand(const scalar dt);
 
       //- Assemble sensitivities
       virtual void assembleSensitivities();
 
       //- Zero sensitivity fields and their constituents
       virtual void clearSensitivities();
 
       //- Get adjoint eikonal solver
       autoPtr<adjointEikonalSolver>& getAdjointEikonalSolver();
 
       //- Write sensitivity maps
       virtual void write(const word& baseName = word::null);
 
       // Inline getters and setters
 
           //- Get access to the includeObjective bool
           inline bool getIncludeObjective() const;
 
           //- Get access to the includeSurfaceArea bool
           inline bool getIncludeSurfaceArea() const;
 
           //- Set includeObjective bool
           inline void setIncludeObjective(const bool includeObjective);
 
           //- Set includeSurfaceArea bool
           inline void setIncludeSurfaceArea(const bool includeSurfaceArea);
 
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace incompressible
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "sensitivitySurfaceIncompressibleI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //