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test_heat_transfer_model_cube3d_istropic_conductivity.cc
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test_heat_transfer_model_cube3d_istropic_conductivity.cc
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/**
* @file test_heat_transfer_model_cube3d_istropic_conductivity.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Rui Wang <rui.wang@epfl.ch>
*
* @date creation: Sun May 01 2011
* @date last modification: Sun Oct 19 2014
*
* @brief test of the class HeatTransferModel on the 3d cube
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014, 2015 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "heat_transfer_model.hh"
#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;
/* -------------------------------------------------------------------------- */
akantu::UInt spatial_dimension = 3;
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
akantu::initialize("material.dat", argc, argv);
akantu::Mesh mesh(spatial_dimension);
akantu::MeshIOMSH mesh_io;
mesh_io.read("cube1.msh", mesh);
akantu::HeatTransferModel model(mesh);
//initialize everything
model.initFull();
//assemble the lumped capacity
model.assembleCapacityLumped();
//get stable time step
akantu::Real time_step = model.getStableTimeStep()*0.8;
cout<<"time step is:"<<time_step<<endl;
model.setTimeStep(time_step);
/// boundary conditions
const akantu::Array<akantu::Real> & nodes = model.getFEEngine().getMesh().getNodes();
akantu::Array<bool> & boundary = model.getBlockedDOFs();
akantu::Array<akantu::Real> & temperature = model.getTemperature();
akantu::Real eps = 1e-15;
double length = 1.;
akantu::UInt nb_nodes = model.getFEEngine().getMesh().getNbNodes();
for (akantu::UInt i = 0; i < nb_nodes; ++i) {
//temperature(i) = t1 - (t1 - t2) * sin(nodes(i, 0) * M_PI / length);
temperature(i) = 100.;
if(nodes(i,0) < eps) {
boundary(i) = true;
temperature(i) = 300.;
}
//set the second boundary condition
if(std::abs(nodes(i,0) - length) < eps) {
boundary(i) = true;
temperature(i) = 300.;
}
// //to insert a heat source
// if(std::abs(nodes(i,0) - length/2.) < 0.025 && std::abs(nodes(i,1) - length/2.) < 0.025 && std::abs(nodes(i,2) - length/2.) < 0.025) {
// boundary(i) = true;
// temperature(i) = 300.;
// }
}
model.updateResidual();
model.setBaseName("heat_transfer_cube3d_istropic_conductivity");
model.addDumpField("temperature" );
model.addDumpField("temperature_rate");
model.addDumpField("residual" );
model.addDumpField("capacity_lumped" );
model.dump();
// //for testing
int max_steps = 1000;
for(int i=0; i<max_steps; i++)
{
model.explicitPred();
model.updateResidual();
model.explicitCorr();
if(i % 100 == 0) model.dump();
if(i % 10000 == 0)
std::cout << "Step " << i << "/" << max_steps << std::endl;
}
cout<< "\n\n Stable Time Step is : " << time_step << "\n \n" <<endl;
return 0;
}

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