DriverArnoldi.h

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///////////////////////////////////////////////////////////////////////////////
//
// File DriverArnoldi.h
//
// For more information, please see: http://www.nektar.info
//
// The MIT License
//
// Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
// Department of Aeronautics, Imperial College London (UK), and Scientific
// Computing and Imaging Institute, University of Utah (USA).
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Description: Base Driver class for the stability solver
//
///////////////////////////////////////////////////////////////////////////////
 
#ifndef NEKTAR_SOLVERUTILS_DRIVERARNOLDI_H
#define NEKTAR_SOLVERUTILS_DRIVERARNOLDI_H
 
#include <SolverUtils/Driver.h>
 
namespace Nektar
{
namespace SolverUtils
{
 
/// Base class for the development of solvers.
class DriverArnoldi: public Driver
{
public:
    friend class MemoryManager<DriverArnoldi>;
 
    SOLVER_UTILS_EXPORT void ArnoldiSummary(std::ostream &out);
 
protected:
    int       m_kdim;  /// Dimension of Krylov subspace
    int       m_nvec;  /// Number of vectors to test
    int       m_nits;  /// Maxmum number of iterations
    NekDouble m_evtol; /// Tolerance of iteratiosn
    NekDouble m_period;/// Period of time stepping algorithm
    bool      m_timeSteppingAlgorithm; /// underlying operator is time stepping
 
    int       m_infosteps; /// interval to dump information if required.
 
    int       m_nfields;
    NekDouble m_realShift;
    NekDouble m_imagShift;
    int       m_negatedOp;   /// Operator in solve call is negated
 
    Array<OneD, NekDouble> m_real_evl;
    Array<OneD, NekDouble> m_imag_evl;
 
 
    /// Constructor
    DriverArnoldi(const LibUtilities::SessionReaderSharedPtr pSession,
                  const SpatialDomains::MeshGraphSharedPtr pGraph);
 
    /// Destructor
    virtual ~DriverArnoldi();
 
    /// Copy Arnoldi storage to fields.
    void CopyArnoldiArrayToField(Array<OneD, NekDouble> &array);
 
    /// Copy fields to Arnoldi storage.
    void CopyFieldToArnoldiArray(Array<OneD, NekDouble> &array);
 
    /// Copy the  forward field to the adjoint system in transient growth 
    /// calculations
    void CopyFwdToAdj();
 
    /// Write coefficients to file
    void WriteFld(std::string file, 
                  std::vector<Array<OneD, NekDouble> > coeffs);
 
    void WriteFld(std::string file, Array<OneD, NekDouble> coeffs);
 
    void WriteEvs(std::ostream &evlout, const int k,
                  const NekDouble real, const NekDouble imag,
                  NekDouble resid = NekConstants::kNekUnsetDouble,
                  bool DumpInverse = true);
 
    virtual void v_InitObject(std::ostream &out = std::cout);
 
    virtual  Array<OneD, NekDouble> v_GetRealEvl(void)
    {
        return m_real_evl;
    }
 
    virtual Array<OneD, NekDouble> v_GetImagEvl(void)
    {
        return m_imag_evl;
    }
 
};
 
}
} //end of namespace
 
#endif //NEKTAR_SOLVERUTILS_DRIVERARNOLDI_H