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test_heat_transfer_model_cube3d.cc
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test_heat_transfer_model_cube3d.cc
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/**
* @file test_heat_transfer_model_cube3d.cc
*
* @author Rui Wang <rui.wang@epfl.ch>
* @author Srinivasa Babu Ramisetti <srinivasa.ramisetti@epfl.ch>
*
* @date Sun May 01 19:14:43 2011
*
* @brief test of the class HeatTransferModel on the 3d cube
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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 <iostream>
#include <fstream>
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "heat_transfer_model.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
UInt spatial_dimension = 3;
ElementType type = _tetrahedron_4;
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
initialize("material.dat", argc, argv);
Mesh mesh(spatial_dimension);
MeshIOMSH mesh_io;
mesh_io.read("cube1.msh", mesh);
HeatTransferModel model(mesh);
//initialize everything
model.initFull();
//assemble the lumped capacity
model.assembleCapacityLumped();
//get and set stable time step
Real time_step = model.getStableTimeStep()*0.8;
std::cout << "time step is:" << time_step << std::endl;
model.setTimeStep(time_step);
/// boundary conditions
const Array<Real> & nodes = mesh.getNodes();
Array<bool> & boundary = model.getBlockedDOFs();
Array<Real> & temperature = model.getTemperature();
UInt nb_nodes = mesh.getNbNodes();
//double t1, t2;
double length;
// t1 = 300.;
// t2 = 100.;
length = 1.;
for (UInt i = 0; i < nb_nodes; ++i) {
//temperature(i) = t1 - (t1 - t2) * sin(nodes(i, 0) * M_PI / length);
temperature(i) = 100.;
//to insert a heat source
Real dx = nodes(i,0) - length/2.;
Real dy = nodes(i,1) - length/2.;
Real dz = nodes(i,2) - length/2.;
Real d = sqrt(dx*dx + dy*dy + dz*dz);
if(d < 0.1){
boundary(i) = true;
temperature(i) = 300.;
}
}
model.updateResidual();
model.setBaseName("heat_transfer_cube3d");
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.solveExplicitLumped();
model.explicitCorr();
if(i % 100 == 0) model.dump();
if(i % 10 == 0) std::cout << "Step " << i << "/" << max_steps << std::endl;
}
std::cout << "Stable Time Step is : " << time_step << std::endl;
return 0;
}

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