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#model_solver.cc#
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/**
* @file model_solver.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Tue Aug 18 2015
* @date last modification: Wed Feb 21 2018
*
* @brief Implementation of ModelSolver
*
* @section LICENSE
*
* Copyright (©) 2015-2018 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 "model_solver.hh"
#include "dof_manager.hh"
#include "dof_manager_default.hh"
#include "mesh.hh"
#include "non_linear_solver.hh"
#include "time_step_solver.hh"
#if defined(AKANTU_USE_PETSC)
#include "dof_manager_petsc.hh"
#endif
/* -------------------------------------------------------------------------- */
namespace akantu {
/* -------------------------------------------------------------------------- */
template <typename T> static T getOptionToType(const std::string & opt_str) {
std::stringstream sstr(opt_str);
T opt;
sstr >> opt;
return opt;
}
/* -------------------------------------------------------------------------- */
ModelSolver::ModelSolver(Mesh & mesh, const ModelType & type, const ID & id,
UInt memory_id)
: Parsable(ParserType::_model, id), SolverCallback(), model_type(type),
parent_id(id), parent_memory_id(memory_id), mesh(mesh),
dof_manager(nullptr), default_solver_id("") {}
/* -------------------------------------------------------------------------- */
ModelSolver::~ModelSolver() = default;
/* -------------------------------------------------------------------------- */
std::tuple<ParserSection, bool> ModelSolver::getParserSection() {
auto sub_sections = getStaticParser().getSubSections(ParserType::_model);
auto it = std::find_if(
sub_sections.begin(), sub_sections.end(), [&](auto && section) {
ModelType type = getOptionToType<ModelType>(section.getName());
// default id should be the model type if not defined
std::string name = section.getParameter("name", this->parent_id);
return type == model_type and name == this->parent_id;
});
if (it == sub_sections.end())
return std::make_tuple(ParserSection(), true);
return std::make_tuple(*it, false);
}
/* -------------------------------------------------------------------------- */
void ModelSolver::initDOFManager() {
// default without external solver activated at compilation same as mumps that
// is the historical solver but with only the lumped solver
ID solver_type = "default";
#if defined(AKANTU_USE_MUMPS)
solver_type = "default";
#elif defined(AKANTU_USE_PETSC)
solver_type = "petsc";
#endif
ParserSection section;
bool is_empty;
std::tie(section, is_empty) = this->getParserSection();
if (not is_empty) {
solver_type = section.getOption(solver_type);
this->initDOFManager(section, solver_type);
} else {
this->initDOFManager(solver_type);
}
}
/* -------------------------------------------------------------------------- */
void ModelSolver::initDOFManager(const ID & solver_type) {
try {
this->dof_manager = DOFManagerFactory::getInstance().allocate(
solver_type, mesh, this->parent_id + ":dof_manager" + solver_type,
this->parent_memory_id);
} catch (...) {
AKANTU_EXCEPTION(
"To use the solver "
<< solver_type
<< " you will have to code it. This is an unknown solver type.");
}
this->setDOFManager(*this->dof_manager);
}
/* -------------------------------------------------------------------------- */
void ModelSolver::initDOFManager(const ParserSection & section,
const ID & solver_type) {
this->initDOFManager(solver_type);
auto sub_sections = section.getSubSections(ParserType::_time_step_solver);
// parsing the time step solvers
for (auto && section : sub_sections) {
ID type = section.getName();
ID solver_id = section.getParameter("name", type);
auto tss_type = getOptionToType<TimeStepSolverType>(type);
auto tss_options = this->getDefaultSolverOptions(tss_type);
auto sub_solvers_sect =
section.getSubSections(ParserType::_non_linear_solver);
auto nb_non_linear_solver_section =
section.getNbSubSections(ParserType::_non_linear_solver);
auto nls_type = tss_options.non_linear_solver_type;
if (nb_non_linear_solver_section == 1) {
auto && nls_section = *(sub_solvers_sect.first);
nls_type = getOptionToType<NonLinearSolverType>(nls_section.getName());
} else if (nb_non_linear_solver_section > 0) {
AKANTU_EXCEPTION("More than one non linear solver are provided for the "
"time step solver "
<< solver_id);
}
this->getNewSolver(solver_id, tss_type, nls_type);
if (nb_non_linear_solver_section == 1) {
const auto & nls_section = *(sub_solvers_sect.first);
this->dof_manager->getNonLinearSolver(solver_id).parseSection(
nls_section);
}
auto sub_integrator_sections =
section.getSubSections(ParserType::_integration_scheme);
for (auto && is_section : sub_integrator_sections) {
const auto & dof_type_str = is_section.getName();
ID dof_id;
try {
ID tmp = is_section.getParameter("name");
dof_id = tmp;
} catch (...) {
AKANTU_EXCEPTION("No degree of freedom name specified for the "
"integration scheme of type "
<< dof_type_str);
}
auto it_type = getOptionToType<IntegrationSchemeType>(dof_type_str);
IntegrationScheme::SolutionType s_type = is_section.getParameter(
"solution_type", tss_options.solution_type[dof_id]);
this->setIntegrationScheme(solver_id, dof_id, it_type, s_type);
}
for (auto & is_type : tss_options.integration_scheme_type) {
if (!this->hasIntegrationScheme(solver_id, is_type.first)) {
this->setIntegrationScheme(solver_id, is_type.first, is_type.second,
tss_options.solution_type[is_type.first]);
}
}
}
if (section.hasParameter("default_solver")) {
ID default_solver = section.getParameter("default_solver");
if (this->hasSolver(default_solver)) {
this->setDefaultSolver(default_solver);
} else
AKANTU_EXCEPTION(
"The solver \""
<< default_solver
<< "\" was not created, it cannot be set as default solver");
}
}
/* -------------------------------------------------------------------------- */
TimeStepSolver & ModelSolver::getSolver(const ID & solver_id) {
ID tmp_solver_id = solver_id;
if (tmp_solver_id == "")
tmp_solver_id = this->default_solver_id;
TimeStepSolver & tss = this->dof_manager->getTimeStepSolver(tmp_solver_id);
return tss;
}
/* -------------------------------------------------------------------------- */
const TimeStepSolver & ModelSolver::getSolver(const ID & solver_id) const {
ID tmp_solver_id = solver_id;
if (solver_id == "")
tmp_solver_id = this->default_solver_id;
const TimeStepSolver & tss =
this->dof_manager->getTimeStepSolver(tmp_solver_id);
return tss;
}
/* -------------------------------------------------------------------------- */
TimeStepSolver & ModelSolver::getTimeStepSolver(const ID & solver_id) {
return this->getSolver(solver_id);
}
/* -------------------------------------------------------------------------- */
const TimeStepSolver &
ModelSolver::getTimeStepSolver(const ID & solver_id) const {
return this->getSolver(solver_id);
}
/* -------------------------------------------------------------------------- */
NonLinearSolver & ModelSolver::getNonLinearSolver(const ID & solver_id) {
return this->getSolver(solver_id).getNonLinearSolver();
}
/* -------------------------------------------------------------------------- */
const NonLinearSolver &
ModelSolver::getNonLinearSolver(const ID & solver_id) const {
return this->getSolver(solver_id).getNonLinearSolver();
}
/* -------------------------------------------------------------------------- */
bool ModelSolver::hasSolver(const ID & solver_id) const {
ID tmp_solver_id = solver_id;
if (solver_id == "")
tmp_solver_id = this->default_solver_id;
if (not this->dof_manager) {
AKANTU_EXCEPTION("No DOF manager was initialized");
}
return this->dof_manager->hasTimeStepSolver(tmp_solver_id);
}
/* -------------------------------------------------------------------------- */
void ModelSolver::setDefaultSolver(const ID & solver_id) {
AKANTU_DEBUG_ASSERT(
this->hasSolver(solver_id),
"Cannot set the default solver to a solver that does not exists");
this->default_solver_id = solver_id;
}
/* -------------------------------------------------------------------------- */
void ModelSolver::solveStep(const ID & solver_id) {
solveStep(*this, solver_id);
}
/* -------------------------------------------------------------------------- */
void ModelSolver::solveStep(SolverCallback & callback,
const ID & solver_id) {
AKANTU_DEBUG_IN();
TimeStepSolver & tss = this->getSolver(solver_id);
// make one non linear solve
tss.solveStep(callback);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void ModelSolver::getNewSolver(const ID & solver_id,
TimeStepSolverType time_step_solver_type,
NonLinearSolverType non_linear_solver_type) {
if (this->default_solver_id == "") {
this->default_solver_id = solver_id;
}
if (non_linear_solver_type == _nls_auto) {
switch (time_step_solver_type) {
case _tsst_dynamic:
case _tsst_static:
non_linear_solver_type = _nls_newton_raphson;
break;
case _tsst_dynamic_lumped:
non_linear_solver_type = _nls_lumped;
break;
case _tsst_not_defined:
AKANTU_EXCEPTION(time_step_solver_type
<< " is not a valid time step solver type");
break;
}
}
this->initSolver(time_step_solver_type, non_linear_solver_type);
NonLinearSolver & nls = this->dof_manager->getNewNonLinearSolver(
solver_id, non_linear_solver_type);
this->dof_manager->getNewTimeStepSolver(solver_id, time_step_solver_type,
nls);
}
/* -------------------------------------------------------------------------- */
Real ModelSolver::getTimeStep(const ID & solver_id) const {
const TimeStepSolver & tss = this->getSolver(solver_id);
return tss.getTimeStep();
}
/* -------------------------------------------------------------------------- */
void ModelSolver::setTimeStep(Real time_step, const ID & solver_id) {
TimeStepSolver & tss = this->getSolver(solver_id);
return tss.setTimeStep(time_step);
}
/* -------------------------------------------------------------------------- */
void ModelSolver::setIntegrationScheme(
const ID & solver_id, const ID & dof_id,
const IntegrationSchemeType & integration_scheme_type,
IntegrationScheme::SolutionType solution_type) {
TimeStepSolver & tss = this->dof_manager->getTimeStepSolver(solver_id);
tss.setIntegrationScheme(dof_id, integration_scheme_type, solution_type);
}
/* -------------------------------------------------------------------------- */
bool ModelSolver::hasDefaultSolver() const {
return (this->default_solver_id != "");
}
/* -------------------------------------------------------------------------- */
bool ModelSolver::hasIntegrationScheme(const ID & solver_id,
const ID & dof_id) const {
TimeStepSolver & tss = this->dof_manager->getTimeStepSolver(solver_id);
return tss.hasIntegrationScheme(dof_id);
}
/* -------------------------------------------------------------------------- */
void ModelSolver::predictor() {}
/* -------------------------------------------------------------------------- */
void ModelSolver::corrector() {}
/* -------------------------------------------------------------------------- */
TimeStepSolverType ModelSolver::getDefaultSolverType() const {
return _tsst_dynamic_lumped;
}
/* -------------------------------------------------------------------------- */
ModelSolverOptions
ModelSolver::getDefaultSolverOptions(__attribute__((unused))
const TimeStepSolverType & type) const {
ModelSolverOptions options;
options.non_linear_solver_type = _nls_auto;
return options;
}
} // namespace akantu
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