StabilizationSUPG_semi_implicit_ale.hpp

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    Copyright (C) 2004, 2005, 2007 EPFL, Politecnico di Milano, INRIA
    Copyright (C) 2010 EPFL, Politecnico di Milano, Emory University

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/*!
   @file
   @brief SUPG stabilization, semi-implicit case.
   @author Davide Forti <davide.forti@epfl.ch>
   @contributor Luca Dede <luca.dede@epfl.ch>
   @maintainer Davide Forti <davide.forti@epfl.ch>
   @date 15-04-2015

   This file contains an ETA implementation of SUPG, for semi-implicit treatment of the convective term.

   For reference, see Paper 
 
   * D. Forti, L. Dede, Semi–implicit BDF time discretization of the Navier–Stokes equations with VMS–LES modeling in
   a High Performance Computing framework. Submitted, available as MATHICSE report, 2015.
   
   * Y. Bazilevs, V.M. Calo, J.A. Cottrell, T.J.R. Hughes, A. Reali, and G. Scovazzi. <i>Variational multiscale
   residual-based turbulence modeling for large eddy simulation of incompressible flows</i>. Comput. Methods Appl. Mech. Engr. 197(1):173–201, 2007.

*/

#ifndef _STABILIZATIONSUPG_SEMI_IMPLICIT_ALE_HPP_
#define _STABILIZATIONSUPG_SEMI_IMPLICIT_ALE_HPP_ 1

// Tell the compiler to ignore specific kind of warnings:
#pragma GCC diagnostic ignored "-Wunused-variable"
#pragma GCC diagnostic ignored "-Wunused-parameter"

#include <Epetra_ConfigDefs.h>
#ifdef EPETRA_MPI
    #include <mpi.h>
    #include <Epetra_MpiComm.h>
#else
    #include <Epetra_SerialComm.h>
#endif

#include <Epetra_FECrsMatrix.h>

//Tell the compiler to restore the warning previously silented
#pragma GCC diagnostic warning "-Wunused-variable"
#pragma GCC diagnostic warning "-Wunused-parameter"

#include <lifev/navier_stokes_blocks/solver/Stabilization.hpp>

#include <lifev/core/fem/FESpace.hpp>
#include <lifev/core/fem/ReferenceFE.hpp>

#include <lifev/eta/fem/ETFESpace.hpp>

// includes for building the matrix graph
#include <Epetra_FECrsGraph.h>
#include <lifev/eta/expression/Integrate.hpp>
#include <lifev/eta/expression/BuildGraph.hpp>

#include <lifev/core/fem/TimeAndExtrapolationHandlerQuadPts.hpp>

namespace LifeV
{

class SquareRoot_supg_semi_implicit_ale
{
public:
    typedef Real return_Type;

    inline return_Type operator() (const Real& a)
    {
        return std::sqrt(a);
    }

    SquareRoot_supg_semi_implicit_ale() {}
    SquareRoot_supg_semi_implicit_ale (const SquareRoot_supg_semi_implicit_ale&) {}
    ~SquareRoot_supg_semi_implicit_ale() {}
};

class StabilizationSUPG_semi_implicit_ale : public Stabilization
{
public:

    //@name Public Types
    //@{
    typedef RegionMesh<LinearTetra> mesh_Type;
    typedef MapEpetra  map_Type;

    typedef VectorEpetra  vector_Type;
    typedef std::shared_ptr<vector_Type>  vectorPtr_Type;

    typedef MatrixEpetra<Real>  matrix_Type;
    typedef std::shared_ptr<matrix_Type>  matrixPtr_Type;

    typedef FESpace< mesh_Type, map_Type > fespace_Type;
    typedef std::shared_ptr< fespace_Type > fespacePtr_Type;

    typedef ETFESpace<mesh_Type, map_Type, 3, 3 > ETFESpace_velocity;
    typedef ETFESpace<mesh_Type, map_Type, 3, 1 > ETFESpace_pressure;

    typedef std::shared_ptr<ETFESpace_velocity > ETFESpacePtr_velocity;
    typedef std::shared_ptr<ETFESpace_pressure > ETFESpacePtr_pressure;

    typedef Epetra_FECrsGraph graph_Type;
    typedef std::shared_ptr<Epetra_FECrsGraph> graphPtr_Type;

    //@}

    //! @name Constructor and Destructor
    //@{
    //! Default Constructor
    StabilizationSUPG_semi_implicit_ale();

    //! ~Destructor
    virtual ~StabilizationSUPG_semi_implicit_ale(){}

    //@}

    //! Build the graphs of each single block
    void buildGraphs();

    //! Updates the system matrix in Navier-Stokes simulations in fixed coordinates
    //  with semi-implicit treatment of the convective term.
    /*!
        @param velocityExtrapolated extrapolation of the fluid velocity
        @param aleVelocity velocity of the domain
     */
    void apply_matrix( const vector_Type& velocityExtrapolated, const vector_Type& velocityALE );

    //! Adds to the right hand side the contribution coming from the SUPG stabilization
    //  in Navier-Stokes simulations in fixed coordinates. Used for NS semi-implicit
    /*!
        @param rhs_velocity velocity component of the right hand side
        @param rhs_pressure pressure component of the right hand side
        @param velocity_extrapolated velocity extrapolated
        @param velocity_rhs velocity term from approximation time derivative
     */
    void apply_vector( vectorPtr_Type& rhs_velocity,
                       vectorPtr_Type& rhs_pressure,
                       const vector_Type& velocityExtrapolated,
                       const vector_Type& velocityALE,
                       const vector_Type& velocity_rhs);

    void setVelocitySpace(fespacePtr_Type velocityFESpace){ M_uFESpace = velocityFESpace;}

    void setPressureSpace(fespacePtr_Type pressureFESpace){ M_pFESpace = pressureFESpace;}

    //! Set the constant C_I for the supg
    void setConstant (const int & value);

    //! Set the fluid density
    void setDensity (const Real & density) { M_density = density;}

    //! Set the bdf order
    void setBDForder (const Real & bdfOrder) { M_bdfOrder = bdfOrder;}

    //! Set the bdf order
    void setAlpha (const Real & alpha) { M_alpha = alpha;}

    //! Set the fluid dynamic viscosity
    void setViscosity (const Real & viscosity) { M_viscosity = viscosity;}

    //! Set the Epetra communicator
    void setCommunicator (std::shared_ptr<Epetra_Comm> comm) { M_comm = comm;}

    //! Set the time step size
    void setTimeStep  (const Real & timestep)  { M_timestep = timestep;}

    void setETvelocitySpace(const ETFESpacePtr_velocity & velocityEta_fespace){ M_fespaceUETA = velocityEta_fespace;}

    void setETpressureSpace(const ETFESpacePtr_pressure & pressureEta_fespace){ M_fespacePETA = pressureEta_fespace;}

    void setUseGraph (const bool& useGraph) { M_useGraph = useGraph; }

    //! @name Getters
    //@{

    matrixPtr_Type const& block_00() const
    {
        return M_block_00;
    }

    matrixPtr_Type const& block_01() const
    {
        return M_block_01;
    }

    matrixPtr_Type const& block_10() const
    {
        return M_block_10;
    }

    matrixPtr_Type const& block_11() const
    {
        return M_block_11;
    }

    std::string label () { return M_label; }

    void setUseODEfineScale ( const bool& useODEfineScale );

    void updateODEfineScale ( const vectorPtr_Type& velocity, const vectorPtr_Type& pressure );

    void setExportFineScaleVelocity ( ExporterHDF5<mesh_Type> & exporter, const int& numElementsTotal);

    //@}

private:

    void setupODEfineScale();

    void computeFineScales ( const vectorPtr_Type& velocity, const vectorPtr_Type& pressure );

    void computeFineScalesForVisualization ( const vectorPtr_Type& velocity, const vectorPtr_Type& pressure );

    //! @name Private Attributes
    //@{

    //! finite element spaces for velocity and pressure
    fespacePtr_Type M_uFESpace;
    fespacePtr_Type M_pFESpace;

    ETFESpacePtr_velocity M_fespaceUETA;
    ETFESpacePtr_pressure M_fespacePETA;

    //! Epetra communicator
    std::shared_ptr<Epetra_Comm> M_comm;

    //! fluid dynamic viscosity @f$\nu@f$
    Real         M_viscosity;

    //! fluid density @f$\nu@f$
    Real         M_density;

    //! stabilization parameters for the momentum and continuity equations
    Real         M_timestep;
    bool         M_flag_timestep;
    Real         M_bdfOrder;
    Real         M_alpha;

    Real         M_C_I;

    // Graphs
    graphPtr_Type M_graph_block00;
    graphPtr_Type M_graph_block01;
    graphPtr_Type M_graph_block10;
    graphPtr_Type M_graph_block11;

    // Matrices
    matrixPtr_Type M_block_00;
    matrixPtr_Type M_block_01;
    matrixPtr_Type M_block_10;
    matrixPtr_Type M_block_11;

    bool M_useGraph;

    std::string M_label;

    bool M_useODEfineScale;

    std::shared_ptr<TimeAndExtrapolationHandlerQuadPts<3>> M_handlerFineScaleVelocity;

    std::vector<std::vector<VectorSmall<3>>> M_fineScaleVelocityRhs;
    std::vector<std::vector<VectorSmall<3>>> M_fineScaleVelocity;
    std::vector<std::vector<VectorSmall<1>>> M_fineScalePressure;

    vectorPtr_Type M_rhsVelocity;
    vectorPtr_Type M_fineVelocity;
    vectorPtr_Type M_finePressure;

    //@}
}; // class StabilizationSUPG_semi_implicit

//! Factory create function
inline StabilizationSUPG_semi_implicit_ale * createStabilizationSUPG_semi_implicit_ale()
{
    return new StabilizationSUPG_semi_implicit_ale();
}
namespace
{
static bool S_registerStabilizationSUPG_semi_implicit_ale = StabilizationFactory::instance().registerProduct ( "SUPG_SEMI_IMPLICIT_ALE",
                                                                                                           &createStabilizationSUPG_semi_implicit_ale );
}

} // namespace LifeV

#endif /* _STABILIZATIONSUPG_SEMI_IMPLICIT_HPP_ */