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test_heat_transfer_model_bar2d_coarse_triangle_mesh.cc
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Sat, Aug 17, 10:14
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rAKA akantu
test_heat_transfer_model_bar2d_coarse_triangle_mesh.cc
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/**
* @file test_heat_transfer_model_bar2d_coarse_triangle_mesh.cc
*
*
* @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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