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rAKA/test/test_model/test_heat_transfer_model/test_heat_transfer_model_bar2d_coarse_square_mesh.cc
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test_heat_transfer_model_bar2d_coarse_square_mesh.cc
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/**
* @file test_heat_transfer_model_bar2d_coarse_square_mesh.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 "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;
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
#include "io_helper.hh"
akantu::UInt paraview_type = iohelper::TETRA1;
void paraviewInit(iohelper::Dumper & dumper);
void paraviewDump(iohelper::Dumper & dumper);
#endif //AKANTU_USE_IOHELPER
/* -------------------------------------------------------------------------- */
akantu::UInt spatial_dimension = 3;
akantu:: ElementType type = akantu::_tetrahedron_4;
akantu::Real density;
akantu::Real conductivity[3][3];
akantu::Real capacity;
/* -------------------------------------------------------------------------- */
int readMaterial () {
string str;
ifstream myfile;
myfile.open("material.dat");
if(!myfile) //Always test the file open.
{
cout<<"Error opening output file"<<endl;
return -1;
}
getline(myfile, str);
density=atof(str.c_str());
getline(myfile, str);
capacity=atof(str.c_str());
getline(myfile, str);
char * cstr, *p;
char * tmp_cstr;
cstr = new char [str.size()+1];
strcpy (cstr, str.c_str());
// p=strtok (cstr," ");
// conductivity[0][0]= atof(p);
// cout<<conductivity[0][0]<<endl;
// p=strtok(NULL, " ");
// conductivity[0][1]= atof(p);
// cout<<conductivity[0][1]<<endl;
// p=strtok(NULL, " ");
// conductivity[0][2]= atof(p);
// cout<<conductivity[0][2]<<endl;
tmp_cstr = cstr;
for(int i=0;i<3;i++)
for(int j=0; j<3;j++)
{
p=strtok(tmp_cstr, " "); tmp_cstr = NULL;
conductivity[i][j]= atof(p);
cout<<conductivity[i][j]<<endl;
}
return 0;
}
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
akantu::Mesh mesh(spatial_dimension);
akantu::MeshIOMSH mesh_io;
mesh_io.read("cube1.msh", mesh);
//just for checking
// mesh_io.read("square1.msh", mesh);
// mesh_io.read("bar1.msh", mesh);
// mesh_io.read("line.msh", mesh);
readMaterial();
cout<<"The density of the material is:"<< density <<endl;
cout<<"The capacity of the material is:"<< capacity <<endl;
model = new akantu::HeatTransferModel(mesh);
//model initialization
model->initModel();
//initialize the vectors
model->initArrays();
nb_nodes = model->getFEEngine().getMesh().getNbNodes();
nb_element = model->getFEEngine().getMesh().getNbElement(type);
akantu::UInt nb_nodes = model->getFEEngine().getMesh().getNbNodes();
model->getHeatFlux().clear();
model->getLumped().clear();
model->getTemperatureGradient(type).clear();
// akantu::debug::setDebugLevel(akantu::dblDump);
// std::cout << model->getTemperatureGradient(type) << std::endl;
// akantu::debug::setDebugLevel(akantu::dblWarning);
model->setDensity(density);
model->setCapacity(capacity);
model->SetConductivityMatrix(conductivity);
//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::Array<akantu::Real> & heat_flux = model->getHeatFlux();
akantu::Real eps = 1e-15;
double t1, t2, length;
t1 = 300.;
t2 = 100.;
length = 1.;
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) = 100.0;
}
//set the second boundary condition
if(std::abs(nodes(i,0) - length) < eps) {
boundary(i) = true;
temperature(i) = 100.;
}
//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) {
// if(std::abs(nodes(i,0) - length/2.) < 0.01 && std::abs(nodes(i,1) - length/2.) < 0.01) {
boundary(i) = true;
temperature(i) = 300.;
}
}
iohelper::DumperParaview dumper;
paraviewInit(dumper);
model->assembleMassLumped(type);
// //for testing
int max_steps = 100000;
for(int i=0; i<max_steps; i++)
{
model->updateHeatFlux();
model->updateTemperature();
if(i % 100 == 0)
paraviewDump(dumper);
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;
}
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
/* -------------------------------------------------------------------------- */
void paraviewInit(iohelper::Dumper & dumper) {
dumper.SetMode(iohelper::TEXT);
dumper.SetPoints(model->getFEEngine().getMesh().getNodes().storage(),
spatial_dimension, nb_nodes, "coordinates2");
dumper.SetConnectivity((int *)model->getFEEngine().getMesh().getConnectivity(type).storage(),
paraview_type, nb_element, iohelper::C_MODE);
dumper.AddNodeDataField(model->getTemperature().storage(),
1, "temperature");
dumper.AddNodeDataField(model->getHeatFlux().storage(),
1, "heat_flux");
dumper.AddNodeDataField(model->getLumped().storage(),
1, "lumped");
dumper.AddElemDataField(model->getTemperatureGradient(type).storage(),
spatial_dimension, "temperature_gradient");
dumper.SetPrefix("paraview/");
dumper.Init();
dumper.Dump();
}
/* -------------------------------------------------------------------------- */
void paraviewDump(iohelper::Dumper & dumper) {
dumper.Dump();
}
/* -------------------------------------------------------------------------- */
#endif AKANTU_USE_IOHELPER
/* -------------------------------------------------------------------------- */
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