MonodomainStiffnessMatrixAssembler.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 MONODOMAINSTIFFNESSMATRIXASSEMBLER_HPP_
00030 #define MONODOMAINSTIFFNESSMATRIXASSEMBLER_HPP_
00031 
00032 
00033 #include "AbstractCardiacFeObjectAssembler.hpp"
00034 #include "HeartConfig.hpp"
00035 #include "AbstractCardiacTissue.hpp"
00036 
00045 template<unsigned ELEMENT_DIM, unsigned SPACE_DIM>
00046 class MonodomainStiffnessMatrixAssembler
00047    : public AbstractCardiacFeObjectAssembler<ELEMENT_DIM, SPACE_DIM, 1, false /*no vectors*/, true/*assembles matrices*/, NORMAL>
00048 {
00049 public:
00060     c_matrix<double,1*(ELEMENT_DIM+1),1*(ELEMENT_DIM+1)>
00061         ComputeMatrixTerm(
00062                 c_vector<double, ELEMENT_DIM+1> &rPhi,
00063                 c_matrix<double, SPACE_DIM, ELEMENT_DIM+1> &rGradPhi,
00064                 ChastePoint<SPACE_DIM> &rX,
00065                 c_vector<double,1> &rU,
00066                 c_matrix<double, 1, SPACE_DIM> &rGradU /* not used */,
00067                 Element<ELEMENT_DIM,SPACE_DIM>* pElement)
00068     {
00069         const c_matrix<double, SPACE_DIM, SPACE_DIM>& sigma_i = this->mpCardiacTissue->rGetIntracellularConductivityTensor(pElement->GetIndex());
00070 
00071         c_matrix<double, SPACE_DIM, ELEMENT_DIM+1> temp = prod(sigma_i, rGradPhi);
00072         c_matrix<double, ELEMENT_DIM+1, ELEMENT_DIM+1> grad_phi_sigma_i_grad_phi =
00073             prod(trans(rGradPhi), temp);
00074 
00075         return grad_phi_sigma_i_grad_phi;
00076     }
00077 
00083     MonodomainStiffnessMatrixAssembler(AbstractTetrahedralMesh<ELEMENT_DIM,SPACE_DIM>* pMesh,
00084                              AbstractCardiacTissue<ELEMENT_DIM,SPACE_DIM>* pTissue)
00085         : AbstractCardiacFeObjectAssembler<ELEMENT_DIM,SPACE_DIM,1,false,true,NORMAL>(pMesh,pTissue)
00086     {
00087     }
00088 };
00089 
00090 #endif /*MONODOMAINSTIFFNESSMATRIXASSEMBLER_HPP_*/

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