NaturalNeumannSurfaceTermAssembler.hpp

00001 /*
00002 
00003 Copyright (C) University of Oxford, 2005-2011
00004 
00005 University of Oxford means the Chancellor, Masters and Scholars of the
00006 University of Oxford, having an administrative office at Wellington
00007 Square, Oxford OX1 2JD, UK.
00008 
00009 This file is part of Chaste.
00010 
00011 Chaste is free software: you can redistribute it and/or modify it
00012 under the terms of the GNU Lesser General Public License as published
00013 by the Free Software Foundation, either version 2.1 of the License, or
00014 (at your option) any later version.
00015 
00016 Chaste is distributed in the hope that it will be useful, but WITHOUT
00017 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00018 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
00019 License for more details. The offer of Chaste under the terms of the
00020 License is subject to the License being interpreted in accordance with
00021 English Law and subject to any action against the University of Oxford
00022 being under the jurisdiction of the English Courts.
00023 
00024 You should have received a copy of the GNU Lesser General Public License
00025 along with Chaste. If not, see <http://www.gnu.org/licenses/>.
00026 
00027 */
00028 
00029 #ifndef NATURALNEUMANNSURFACETERMASSEMBLER_HPP
00030 #define NATURALNEUMANNSURFACETERMASSEMBLER_HPP
00031 
00032 #include "AbstractFeSurfaceIntegralAssembler.hpp"
00033 
00034 
00054 template<unsigned ELEMENT_DIM, unsigned SPACE_DIM, unsigned PROBLEM_DIM>
00055 class NaturalNeumannSurfaceTermAssembler : public AbstractFeSurfaceIntegralAssembler<ELEMENT_DIM,SPACE_DIM,PROBLEM_DIM>
00056 {
00057 protected:
00059     double mScaleFactor;
00060 
00061 
00076     virtual c_vector<double, PROBLEM_DIM*ELEMENT_DIM> ComputeVectorSurfaceTerm(
00077         const BoundaryElement<ELEMENT_DIM-1,SPACE_DIM>& rSurfaceElement,
00078         c_vector<double, ELEMENT_DIM>& rPhi,
00079         ChastePoint<SPACE_DIM>& rX);
00080 
00081 public:
00089     NaturalNeumannSurfaceTermAssembler(AbstractTetrahedralMesh<ELEMENT_DIM,SPACE_DIM>* pMesh,
00090                                        BoundaryConditionsContainer<ELEMENT_DIM,SPACE_DIM,PROBLEM_DIM>* pBoundaryConditions,
00091                                        unsigned numQuadPoints = 2)
00092         : AbstractFeSurfaceIntegralAssembler<ELEMENT_DIM,SPACE_DIM,PROBLEM_DIM>(pMesh, pBoundaryConditions, numQuadPoints),
00093           mScaleFactor(1.0)
00094     {
00095     }
00096 
00101     void SetScaleFactor(double scaleFactor)
00102     {
00103         mScaleFactor = scaleFactor;
00104     }
00105 };
00106 
00107 
00108 
00109 template <unsigned ELEMENT_DIM, unsigned SPACE_DIM, unsigned PROBLEM_DIM>
00110 c_vector<double, PROBLEM_DIM*ELEMENT_DIM> NaturalNeumannSurfaceTermAssembler<ELEMENT_DIM, SPACE_DIM, PROBLEM_DIM>::ComputeVectorSurfaceTerm(
00111         const BoundaryElement<ELEMENT_DIM-1,SPACE_DIM>& rSurfaceElement,
00112         c_vector<double, ELEMENT_DIM>& rPhi,
00113         ChastePoint<SPACE_DIM>& rX)
00114 {
00115     c_vector<double, ELEMENT_DIM*PROBLEM_DIM> ret;
00116     c_vector<double, PROBLEM_DIM> neumann_bc_values;
00117 
00118     for (unsigned i=0; i<ELEMENT_DIM; i++)
00119     {
00120         for(unsigned problem_dim = 0; problem_dim<PROBLEM_DIM; problem_dim++)
00121         {
00122             double neumann_bc_value = this->mpBoundaryConditions->GetNeumannBCValue(&rSurfaceElement, rX, problem_dim);
00123 
00124             ret(PROBLEM_DIM*i + problem_dim)  =  mScaleFactor * rPhi(i) * neumann_bc_value;
00125         }
00126     }
00127 
00128     return ret;
00129 }
00130 
00131 #endif /* NATURALNEUMANNSURFACETERMASSEMBLER_HPP */