newton_w_line_search.h

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//---------------------------------------------------------------------------
//
//    FCST: Fuel Cell Simulation Toolbox
//
//    Copyright (C) 2009-13 by Energy Systems Design Laboratory, University of Alberta
//
//    This software is distributed under the MIT License.
//    For more information, see the README file in /doc/LICENSE
//
//    - Class: newton_w_line_search.h
//    - Description: Variant of the Newton-Raphson solver
//    - Developers: Marc Secanell
//
//---------------------------------------------------------------------------

#ifndef __deal2__appframe__newton_w_lines_search_h
#define __deal2__appframe__newton_w_lines_search_h

#include <solvers/newton_base.h>

namespace FuelCell
{
namespace ApplicationCore
{
    class NewtonLineSearch : public newtonBase
    {
    public:
        static const FuelCell::ApplicationCore::Event bad_derivative;
        NewtonLineSearch (ApplicationBase& app);

        virtual void declare_parameters (ParameterHandler& param);

        void _initialize (ParameterHandler& param);

        virtual void initialize (ParameterHandler& param);

        virtual void solve(FuelCell::ApplicationCore::FEVector& u,
                           const FuelCell::ApplicationCore::FEVectors& in_vectors);


    private:

        double overrelax;
        unsigned int overrelax_steps;
        bool line_search;
        
        unsigned int block_to_fix;
        
        bool find_negative_values(const FEVector& u);
    };
}
}

#endif