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boundary_condition_tmpl.hh
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/**
* @file boundary_condition_tmpl.hh
*
* @author Dana Christen <dana.christen@gmail.com>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri May 03 2013
* @date last modification: Mon Oct 28 2019
*
* @brief implementation of the applyBC
*
*
* @section LICENSE
*
* Copyright (©) 2014-2021 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 "boundary_condition.hh"
#include "element_group.hh"
/* -------------------------------------------------------------------------- */
#ifndef AKANTU_BOUNDARY_CONDITION_TMPL_HH_
#define AKANTU_BOUNDARY_CONDITION_TMPL_HH_
namespace akantu {
/* -------------------------------------------------------------------------- */
template <typename ModelType>
void BoundaryCondition<ModelType>::initBC(ModelType & model,
Array<Real> & primal,
Array<Real> & dual) {
this->model = &model;
this->primal = &primal;
this->dual = &dual;
}
/* -------------------------------------------------------------------------- */
template <typename ModelType>
void BoundaryCondition<ModelType>::initBC(ModelType & model,
Array<Real> & primal,
Array<Real> & primal_increment,
Array<Real> & dual) {
this->initBC(model, primal, dual);
this->primal_increment = &primal_increment;
}
/* -------------------------------------------------------------------------- */
/* Partial specialization for DIRICHLET functors */
template <typename ModelType>
template <typename FunctorType>
struct BoundaryCondition<ModelType>::TemplateFunctionWrapper<
FunctorType, BC::Functor::_dirichlet> {
static inline void applyBC(const FunctorType & func,
const ElementGroup & group,
BoundaryCondition<ModelType> & bc_instance) {
auto & model = bc_instance.getModel();
auto & primal = bc_instance.getPrimal();
const auto & coords = model.getMesh().getNodes();
auto & boundary_flags = model.getBlockedDOFs();
UInt dim = model.getMesh().getSpatialDimension();
auto primal_iter = primal.begin(primal.getNbComponent());
auto coords_iter = coords.begin(dim);
auto flags_iter = boundary_flags.begin(boundary_flags.getNbComponent());
for (auto n : group.getNodeGroup()) {
Vector<bool> flag(flags_iter[n]);
Vector<Real> primal(primal_iter[n]);
Vector<Real> coords(coords_iter[n]);
func(n, flag, primal, coords);
}
}
};
/* -------------------------------------------------------------------------- */
/* Partial specialization for NEUMANN functors */
template <typename ModelType>
template <typename FunctorType>
struct BoundaryCondition<ModelType>::TemplateFunctionWrapper<
FunctorType, BC::Functor::_neumann> {
static inline void applyBC(const FunctorType & func,
const ElementGroup & group,
BoundaryCondition<ModelType> & bc_instance) {
UInt dim = bc_instance.getModel().getSpatialDimension();
switch (dim) {
case 1: {
AKANTU_TO_IMPLEMENT();
break;
}
case 2:
case 3: {
applyBC(func, group, bc_instance, _not_ghost);
applyBC(func, group, bc_instance, _ghost);
break;
}
}
}
static inline void applyBC(const FunctorType & func,
const ElementGroup & group,
BoundaryCondition<ModelType> & bc_instance,
GhostType ghost_type) {
auto & model = bc_instance.getModel();
auto & dual = bc_instance.getDual();
const auto & mesh = model.getMesh();
const auto & nodes_coords = mesh.getNodes();
const auto & fem_boundary = model.getFEEngineBoundary();
UInt dim = model.getSpatialDimension();
UInt nb_degree_of_freedom = dual.getNbComponent();
IntegrationPoint quad_point;
quad_point.ghost_type = ghost_type;
// Loop over the boundary element types
for (auto && type : group.elementTypes(dim - 1, ghost_type)) {
const auto & element_ids = group.getElements(type, ghost_type);
UInt nb_quad_points =
fem_boundary.getNbIntegrationPoints(type, ghost_type);
UInt nb_elements = element_ids.size();
UInt nb_nodes_per_element = mesh.getNbNodesPerElement(type);
Array<Real> dual_before_integ(nb_elements * nb_quad_points,
nb_degree_of_freedom, 0.);
Array<Real> quad_coords(nb_elements * nb_quad_points, dim);
const auto & normals_on_quad =
fem_boundary.getNormalsOnIntegrationPoints(type, ghost_type);
fem_boundary.interpolateOnIntegrationPoints(
nodes_coords, quad_coords, dim, type, ghost_type, element_ids);
auto normals_begin = normals_on_quad.begin(dim);
decltype(normals_begin) normals_iter;
auto quad_coords_iter = quad_coords.begin(dim);
auto dual_iter = dual_before_integ.begin(nb_degree_of_freedom);
quad_point.type = type;
for (auto el : element_ids) {
quad_point.element = el;
normals_iter = normals_begin + el * nb_quad_points;
for (auto q : arange(nb_quad_points)) {
quad_point.num_point = q;
func(quad_point, *dual_iter, *quad_coords_iter, *normals_iter);
++dual_iter;
++quad_coords_iter;
++normals_iter;
}
}
Array<Real> dual_by_shapes(nb_elements * nb_quad_points,
nb_degree_of_freedom * nb_nodes_per_element);
fem_boundary.computeNtb(dual_before_integ, dual_by_shapes, type,
ghost_type, element_ids);
Array<Real> dual_by_shapes_integ(nb_elements, nb_degree_of_freedom *
nb_nodes_per_element);
fem_boundary.integrate(dual_by_shapes, dual_by_shapes_integ,
nb_degree_of_freedom * nb_nodes_per_element, type,
ghost_type, element_ids);
// assemble the result into force vector
model.getDOFManager().assembleElementalArrayLocalArray(
dual_by_shapes_integ, dual, type, ghost_type, 1., element_ids);
}
}
};
/* -------------------------------------------------------------------------- */
template <typename ModelType>
template <typename FunctorType>
inline void BoundaryCondition<ModelType>::applyBC(const FunctorType & func) {
auto bit = model->getMesh().getGroupManager().element_group_begin();
auto bend = model->getMesh().getGroupManager().element_group_end();
for (; bit != bend; ++bit) {
applyBC(func, *bit);
}
}
/* -------------------------------------------------------------------------- */
template <typename ModelType>
template <typename FunctorType>
inline void
BoundaryCondition<ModelType>::applyBC(const FunctorType & func,
const std::string & group_name) {
try {
const ElementGroup & element_group =
model->getMesh().getElementGroup(group_name);
applyBC(func, element_group);
} catch (akantu::debug::Exception & e) {
AKANTU_EXCEPTION("Error applying a boundary condition onto \""
<< group_name << "\"! [" << e.what() << "]");
}
}
/* -------------------------------------------------------------------------- */
template <typename ModelType>
template <typename FunctorType>
inline void
BoundaryCondition<ModelType>::applyBC(const FunctorType & func,
const ElementGroup & element_group) {
#if !defined(AKANTU_NDEBUG)
if (element_group.getDimension() != model->getSpatialDimension() - 1) {
AKANTU_DEBUG_WARNING("The group "
<< element_group.getName()
<< " does not contain only boundaries elements");
}
#endif
TemplateFunctionWrapper<FunctorType>::applyBC(func, element_group, *this);
}
#endif /* AKANTU_BOUNDARY_CONDITION_TMPL_HH_ */
} // namespace akantu

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