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stimulation_temperature.cc
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rLIBMULTISCALE LibMultiScale
stimulation_temperature.cc
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/**
* @file stimulation_temperature.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Srinivasa Babu Ramisetti <srinivasa.ramisetti@epfl.ch>
*
* @date Wed Jul 09 21:59:47 2014
*
* @brief Set a given temperature to a set of DOFs
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* LibMultiScale 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.
*
* LibMultiScale 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 LibMultiScale. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#include "stimulation_temperature.hh"
#include "compute_ekin.hh"
#include "lib_continuum.hh"
#include "lib_dd.hh"
#include "lib_md.hh"
#include "lm_common.hh"
#include <random>
/* -------------------------------------------------------------------------- */
__BEGIN_LIBMULTISCALE__
/* -------------------------------------------------------------------------- */
/* LMDESC TEMPERATURE
This stimulator sets initial velocity to input a temperature.
*/
/* LMEXAMPLE STIMULATION TEMPERATURE TEMP 100 SEED 32 */
/* LMEXAMPLE STIMULATION TEMPERATURE FLUX_FLAG FLUX 1 SEED 32 */
/* LMHERITANCE action_interface */
inline
void
StimulationTemperature
::
declareParams
()
{
StimulationInterface
::
declareParams
();
/* LMKEYWORD TEMP
Set the temperature desired to be set
*/
this
->
parseKeyword
(
"TEMP"
,
temperature
);
/* LMKEYWORD SEED
Set the seed for the random generator
*/
this
->
parseKeyword
(
"SEED"
,
seed
);
/* LMKEYWORD HEAT_RATE
Set the heat rate per node (only for finite elements)
*/
this
->
parseKeyword
(
"HEAT_RATE"
,
heat_rate_per_node
,
0.
);
/* LMKEYWORD FLUX_FLAG
Set the flux per node (only for finite elements)
*/
this
->
parseTag
(
"FLUX_FLAG"
,
flux_flag
,
false
);
}
/* -------------------------------------------------------------------------- */
StimulationTemperature
::
StimulationTemperature
(
const
std
::
string
&
name
)
:
LMObject
(
name
),
flux_flag
(
false
){};
/* -------------------------------------------------------------------------- */
StimulationTemperature
::~
StimulationTemperature
(){};
/* -------------------------------------------------------------------------- */
template
<
typename
Cont
>
enable_if_md
<
Cont
>
StimulationTemperature
::
stimulate
(
Cont
&
cont
)
{
constexpr
UInt
Dim
=
Cont
::
Dim
;
std
::
default_random_engine
generator
(
seed
);
std
::
normal_distribution
<
double
>
distribution
;
for
(
auto
&&
at
:
cont
)
{
auto
vel
=
at
.
velocity
();
for
(
UInt
i
=
0
;
i
<
Dim
;
++
i
)
vel
[
i
]
=
distribution
(
generator
);
}
ComputeEKin
compute_ekin
(
"ComputeEkin:"
+
this
->
getID
());
compute_ekin
.
build
(
cont
);
Real
T_
=
compute_ekin
.
get
(
1
);
Real
alpha
=
sqrt
(
temperature
/
T_
);
for
(
auto
&&
at
:
cont
)
{
DUMP
(
"procede a la stimulation de l'atome a la position "
<<
at
,
DBG_INFO
);
at
.
velocity
()
*=
alpha
;
}
compute_ekin
.
build
(
cont
);
T_
=
compute_ekin
.
get
(
1
);
}
/* -------------------------------------------------------------------------- */
template
<
typename
Cont
>
enable_if_mesh
<
Cont
>
StimulationTemperature
::
stimulate
(
Cont
&
cont
)
{
if
(
!
flux_flag
)
{
for
(
auto
&&
n
:
cont
)
{
n
.
temperature
()
=
this
->
temperature
;
}
}
else
{
for
(
auto
&&
n
:
cont
)
{
n
.
externalHeatRate
()
=
this
->
heat_rate_per_node
;
}
}
}
/* -------------------------------------------------------------------------- */
DECLARE_STIMULATION_MAKE_CALL
(
StimulationTemperature
);
__END_LIBMULTISCALE__
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