NaturalNeumannSurfaceTermAssembler.hpp

/*

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*/

#ifndef NATURALNEUMANNSURFACETERMASSEMBLER_HPP
#define NATURALNEUMANNSURFACETERMASSEMBLER_HPP

#include "AbstractFeSurfaceIntegralAssembler.hpp"


template<unsigned ELEMENT_DIM, unsigned SPACE_DIM, unsigned PROBLEM_DIM>
class NaturalNeumannSurfaceTermAssembler : public AbstractFeSurfaceIntegralAssembler<ELEMENT_DIM,SPACE_DIM,PROBLEM_DIM>
{
protected:
    double mScaleFactor;


    virtual c_vector<double, PROBLEM_DIM*ELEMENT_DIM> ComputeVectorSurfaceTerm(
        const BoundaryElement<ELEMENT_DIM-1,SPACE_DIM>& rSurfaceElement,
        c_vector<double, ELEMENT_DIM>& rPhi,
        ChastePoint<SPACE_DIM>& rX);

public:
    NaturalNeumannSurfaceTermAssembler(AbstractTetrahedralMesh<ELEMENT_DIM,SPACE_DIM>* pMesh,
                                       BoundaryConditionsContainer<ELEMENT_DIM,SPACE_DIM,PROBLEM_DIM>* pBoundaryConditions)
        : AbstractFeSurfaceIntegralAssembler<ELEMENT_DIM,SPACE_DIM,PROBLEM_DIM>(pMesh, pBoundaryConditions),
          mScaleFactor(1.0)
    {
    }

    void SetScaleFactor(double scaleFactor)
    {
        mScaleFactor = scaleFactor;
    }
};

template <unsigned ELEMENT_DIM, unsigned SPACE_DIM, unsigned PROBLEM_DIM>
c_vector<double, PROBLEM_DIM*ELEMENT_DIM> NaturalNeumannSurfaceTermAssembler<ELEMENT_DIM, SPACE_DIM, PROBLEM_DIM>::ComputeVectorSurfaceTerm(
        const BoundaryElement<ELEMENT_DIM-1,SPACE_DIM>& rSurfaceElement,
        c_vector<double, ELEMENT_DIM>& rPhi,
        ChastePoint<SPACE_DIM>& rX)
{
    c_vector<double, ELEMENT_DIM*PROBLEM_DIM> ret;
    c_vector<double, PROBLEM_DIM> neumann_bc_values;

    for (unsigned i=0; i<ELEMENT_DIM; i++)
    {
        for (unsigned problem_dim = 0; problem_dim<PROBLEM_DIM; problem_dim++)
        {
            double neumann_bc_value = this->mpBoundaryConditions->GetNeumannBCValue(&rSurfaceElement, rX, problem_dim);

            ret(PROBLEM_DIM*i + problem_dim)  =  mScaleFactor * rPhi(i) * neumann_bc_value;
        }
    }

    return ret;
}

#endif /* NATURALNEUMANNSURFACETERMASSEMBLER_HPP */