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stimulation_veluni.cc
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stimulation_veluni.cc
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/**
* @file stimulation_veluni.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Till Junge <till.junge@epfl.ch>
*
* @date Wed Jul 09 21:59:47 2014
*
* @brief This stimulator allows to enforce a constant velocity motion
*
* @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 "lm_common.hh"
#include "stimulation_veluni.hh"
#include "lib_md.hh"
#include "lib_continuum.hh"
#include "lib_dd.hh"
#include "filter.hh"
#include "ref_point_data.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_LIBMULTISCALE__
template <UInt Dim, int Dir, typename Cont>
void apply_vel(Cont & cont, Real vel){
typedef typename Cont::Ref RefDof;
typename Cont::iterator it = cont.getIterator();
for (RefDof at = it.getFirst() ; !it.end() ; at = it.getNext()) {
DUMP("proceed stimulation of atom " << at,DBG_DETAIL);
at.velocity(Dir) = vel;
at.force(Dir) = 0.0;
}
}
/* -------------------------------------------------------------------------- */
template <UInt Dim, typename Cont>
void apply_vel(Cont & cont, const Quantity<Length,Dim> & vec){
typedef typename Cont::Ref RefDof;
typename Cont::iterator it = cont.getIterator();
for (RefDof at = it.getFirst() ; !it.end() ; at = it.getNext()) {
DUMP("proceed stimulation of atom " << at,DBG_DETAIL);
for (UInt i = 0; i < Dim; ++i) {
at.velocity(i) = vec[i];
at.force(i) = 0.0;
}
}
}
/* -------------------------------------------------------------------------- */
template <typename Cont>
void StimulationVelUni<Cont>::stimulate(Cont & cont, UInt stage) {
static const UInt Dim = Cont::Dim;
if (this->directions.size() == 0) apply_vel<Dim>(cont, this->vec);
else {
for (UInt i = 0; i < directions.size(); ++i) {
int dir = directions[i];
if (dir >= 0 && dir < int(Dim)) {
switch (dir) {
case 0: apply_vel<Dim,0>(cont, this->vec[0]);break;
case 1: apply_vel<Dim,1>(cont, this->vec[1]);break;
case 2: apply_vel<Dim,2>(cont, this->vec[2]);break;
default: LM_FATAL("unknown dimension");
}
}
else LM_FATAL("unknown dimension");
}
}
}
/* -------------------------------------------------------------------------- */
/* LMDESC VELUNI
This stimulator allows to enforce a constant velocity motion.
The way chosen to enforce this is by cancelling the force
and imposing a constant velocity field as provided by keyword VEC. \ \
The algorithm is:\ \
\begin{align*}
\forall i \in dir, \quad f_i = 0 \quad v_i = VEC
\end{align*}
*/
/* LMEXAMPLE STIMULATION uni VELUNI INPUT md VEC 1e-5 0 0 */
template <typename Cont>
void StimulationVelUni<Cont>::declareParams(){
Stimulation<Cont>::declareParams();
/* LMKEYWORD VEC
Specifies the vector to be imposed to the velocity field.
*/
this->parseVectorKeyword("VEC",spatial_dimension,vec);
/* LMKEYWORD DIR
Specifies the direction of the constraint
0 is X, 1 is Y, 2 is Z and -1(default) is all directions
*/
this->parseKeyword("DIR",directions);
};
/* -------------------------------------------------------------------------- */
DECLARE_STIMULATION(StimulationVelUni,LIST_ATOM_MODEL)
DECLARE_STIMULATION(StimulationVelUni,LIST_CONTINUUM_MODEL)
DECLARE_STIMULATION(StimulationVelUni,LIST_DD_MODEL)
DECLARE_STIMULATION_REFPOINT(StimulationVelUni)
DECLARE_STIMULATION_GENERIC_MESH(StimulationVelUni)
__END_LIBMULTISCALE__

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