Diffusion akantu (bugfixes/documentation) Browse

documentation

diffusion_model.cc
View Options

			/**
			* Copyright (©) 2011-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
			* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
			*
			* This file is part of Akantu
			*
			* 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 "heat_transfer_model.hh"
			// #include "dumpable_inline_impl.hh"
			#include "element_synchronizer.hh"
			#include "fe_engine_template.hh"
			// #include "generalized_trapezoidal.hh"
			#include "diffusion_law.hh"
			#include "group_manager_inline_impl.hh"
			#include "integrator_gauss.hh"
			#include "mesh.hh"
			#include "parser.hh"
			#include "shape_lagrange.hh"
			/* -------------------------------------------------------------------------- */
			#include "dumper_element_partition.hh"

			// #include "dumper_elemental_field.hh"
			#include "dumper_internal_material_field.hh"
			#include "dumper_iohelper_paraview.hh"
			/* -------------------------------------------------------------------------- */

			namespace akantu {

			namespace diffusion {
			namespace details {
			class ComputeRhoFunctor {
			public:
			ComputeRhoFunctor(const DiffusionModel & model) : model(model){};

			void operator()(Matrix<Real> & rho, const Element & element) {
			auto law_id = model.getConstitutiveLawByElement()(element);
			rho.array() = model.getConstitutiveLaw(law_id).getRho();
			}

			private:
			const DiffusionModel & model;
			};
			} // namespace details
			} // namespace diffusion

			/* -------------------------------------------------------------------------- */
			DiffusionModel::DiffusionModel(Mesh & mesh, Int dim, const ID & id,
			const std::shared_ptr<DOFManager> & dof_manager,
			const ID & dof_name, ModelType model_type)
			: Parent(mesh, model_type, dim, id), dof_name(dof_name) {
			AKANTU_DEBUG_IN();

			this->initDOFManager(dof_manager);

			if (this->mesh.isDistributed()) {
			auto & synchronizer = this->mesh.getElementSynchronizer();
			this->registerSynchronizer(synchronizer, SynchronizationTag::_diffusion);
			this->registerSynchronizer(synchronizer,
			SynchronizationTag::_diffusion_gradient);
			}

			registerFEEngineObject<FEEngineType>(id + ":fem", mesh, spatial_dimension);

			this->mesh.registerDumper<DumperParaview>(id, id, true);
			this->mesh.addDumpMesh(mesh, spatial_dimension, _not_ghost, _ek_regular);

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			FEEngine & DiffusionModel::getFEEngineBoundary(const ID & name) {
			return aka::as_type<FEEngine>(getFEEngineClassBoundary<FEEngineType>(name));
			}

			/* -------------------------------------------------------------------------- */
			MatrixType DiffusionModel::getMatrixType(const ID & matrix_id) const {
			if (matrix_id == "K" or matrix_id == "M") {
			return _symmetric;
			}

			return _mt_not_defined;
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleMatrix(const ID & matrix_id) {
			if (matrix_id == "K") {
			this->assembleDiffisivityMatrix();
			} else if (matrix_id == "M" and need_to_reassemble_capacity) {
			this->assembleCapacityMatrix();
			}
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleLumpedMatrix(const ID & matrix_id) {
			if (matrix_id == "M" and need_to_reassemble_capacity) {
			this->assembleCapacityMatrixLumped();
			}
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleResidual() {
			this->assembleInternalFlow();

			this->getDOFManager().assembleToResidual(dof_name, *this->external_flow, 1);
			this->getDOFManager().assembleToResidual(dof_name, *this->internal_flow, 1);
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::predictor() { ++diffusion_release; }
			/* -------------------------------------------------------------------------- */
			void DiffusionModel::corrector() { ++diffusion_release; }

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::initSolver(TimeStepSolverType time_step_solver_type,
			NonLinearSolverType /unused/) {
			DOFManager & dof_manager = this->getDOFManager();

			this->allocNodalField(this->diffusion, 1, dof_name);
			this->allocNodalField(this->external_flow, 1, "external_flow");
			this->allocNodalField(this->internal_flow, 1, "internal_flow");
			this->allocNodalField(this->blocked_dofs, 1, "blocked_dofs");

			if (not dof_manager.hasDOFs(dof_name)) {
			dof_manager.registerDOFs(dof_name, *this->diffusion, _dst_nodal);
			dof_manager.registerBlockedDOFs(dof_name, *this->blocked_dofs);
			}

			if (time_step_solver_type == TimeStepSolverType::_dynamic \|\|
			time_step_solver_type == TimeStepSolverType::_dynamic_lumped) {
			this->allocNodalField(this->diffusion_rate, 1, dof_name + "_rate");

			if (not dof_manager.hasDOFsDerivatives(dof_name, 1)) {
			dof_manager.registerDOFsDerivative(dof_name, 1, *this->diffusion_rate);
			}
			}
			}

			/* -------------------------------------------------------------------------- */
			std::tuple<ID, TimeStepSolverType>
			DiffusionModel::getDefaultSolverID(const AnalysisMethod & method) {
			switch (method) {
			case _explicit_lumped_mass: {
			return std::make_tuple("explicit_lumped",
			TimeStepSolverType::_dynamic_lumped);
			}
			case _static: {
			return std::make_tuple("static", TimeStepSolverType::_static);
			}
			case _implicit_dynamic: {
			return std::make_tuple("implicit", TimeStepSolverType::_dynamic);
			}
			default:
			return std::make_tuple("unknown", TimeStepSolverType::_not_defined);
			}
			}

			/* -------------------------------------------------------------------------- */
			ModelSolverOptions
			DiffusionModel::getDefaultSolverOptions(const TimeStepSolverType & type) const {
			ModelSolverOptions options;

			switch (type) {
			case TimeStepSolverType::_dynamic_lumped: {
			options.non_linear_solver_type = NonLinearSolverType::_lumped;
			options.integration_scheme_type[dof_name] =
			IntegrationSchemeType::_forward_euler;
			options.solution_type[dof_name] = IntegrationScheme::_temperature_rate;
			break;
			}
			case TimeStepSolverType::_static: {
			options.non_linear_solver_type = NonLinearSolverType::_newton_raphson;
			options.integration_scheme_type[dof_name] =
			IntegrationSchemeType::_pseudo_time;
			options.solution_type[dof_name] = IntegrationScheme::_not_defined;
			break;
			}
			case TimeStepSolverType::_dynamic: {
			if (this->method == _explicit_consistent_mass) {
			options.non_linear_solver_type = NonLinearSolverType::_newton_raphson;
			options.integration_scheme_type[dof_name] =
			IntegrationSchemeType::_forward_euler;
			options.solution_type[dof_name] = IntegrationScheme::_temperature_rate;
			} else {
			options.non_linear_solver_type = NonLinearSolverType::_newton_raphson;
			options.integration_scheme_type[dof_name] =
			IntegrationSchemeType::_backward_euler;
			options.solution_type[dof_name] = IntegrationScheme::_temperature;
			}
			break;
			}
			default:
			AKANTU_EXCEPTION(type << " is not a valid time step solver type");
			}

			return options;
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleDiffisivityMatrix() {
			AKANTU_DEBUG_ASSERT(this->getDOFManager().hasMatrix("K"),
			"The K matrix has not been initialized yet.");

			this->getDOFManager().zeroMatrix("K");

			for_each_constitutive_law(
			[](auto && diffusion_law) { diffusion_law.assembleDiffusivityMatrix(); });
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleInternalFlow() {
			this->internal_flow->zero();

			this->synchronize(SynchronizationTag::_diffusion);

			for (auto ghost_type : ghost_types) {
			for_each_constitutive_law([&](auto && diffusion_law) {
			diffusion_law.computeDiffusivityGradU(ghost_type);
			});

			for_each_constitutive_law([&](auto && diffusion_law) {
			diffusion_law.assembleInternalFlow(ghost_type);
			});
			}
			}

			/* -------------------------------------------------------------------------- */
			auto DiffusionModel::getStableTimeStep() -> Real {
			AKANTU_DEBUG_IN();

			Real el_size{};
			Real min_el_size = std::numeric_limits<Real>::max();

			for (auto && type : mesh.elementTypes(spatial_dimension, _not_ghost)) {
			auto nb_nodes_per_element = mesh.getNbNodesPerElement(type);
			Array<Real> coord(0, nb_nodes_per_element * spatial_dimension);
			FEEngine::extractNodalToElementField(mesh, mesh.getNodes(), coord, type,
			_not_ghost);

			for (auto && el_coord :
			make_view(coord, spatial_dimension, nb_nodes_per_element)) {
			el_size = FEEngine::getElementInradius(el_coord, type);
			min_el_size = std::min(min_el_size, el_size);
			}
			}

			Real min_dt = std::numeric_limits<Real>::max();
			for_each_constitutive_law([&](auto && diffusion_law) {
			min_dt = std::min(diffusion_law.getStableTimeStep(min_el_size), min_dt);
			});

			mesh.getCommunicator().allReduce(min_dt, SynchronizerOperation::_min);

			AKANTU_DEBUG_OUT();

			return min_dt;
			}
			/* -------------------------------------------------------------------------- */

			void DiffusionModel::setTimeStep(Real time_step, const ID & solver_id) {
			Model::setTimeStep(time_step, solver_id);

			this->mesh.getDumper(id).setTimeStep(time_step);
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleCapacityMatrixLumped() {
			AKANTU_DEBUG_IN();

			if (!this->getDOFManager().hasLumpedMatrix("M")) {
			this->getDOFManager().getNewLumpedMatrix("M");
			}

			this->getDOFManager().zeroLumpedMatrix("M");

			for (auto && ghost_type : ghost_types) {
			auto & fem = getFEEngineClass<FEEngineType>();
			diffusion::details::ComputeRhoFunctor compute_rho(*this);

			for (auto && type :
			mesh.elementTypes(spatial_dimension, ghost_type, _ek_regular)) {
			fem.assembleFieldLumped(compute_rho, "M", dof_name, this->getDOFManager(),
			type, ghost_type);
			}
			}

			need_to_reassemble_capacity_lumped = false;

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::assembleCapacityMatrix() {
			AKANTU_DEBUG_IN();
			auto ghost_type = _not_ghost;

			this->getDOFManager().zeroMatrix("M");

			auto & fem = getFEEngineClass<FEEngineType>();

			diffusion::details::ComputeRhoFunctor rho_functor(*this);

			for (auto && type :
			mesh.elementTypes(spatial_dimension, ghost_type, _ek_regular)) {
			fem.assembleFieldMatrix(rho_functor, "M", dof_name, this->getDOFManager(),
			type, ghost_type);
			}

			need_to_reassemble_capacity = false;

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			auto DiffusionModel::computeThermalEnergyByNode() -> Real {
			AKANTU_DEBUG_IN();
			auto time_step = this->getTimeStep();
			Real ethermal = 0.;

			for (auto && [n, flow] :
			enumerate(make_view(*internal_flow, internal_flow->getNbComponent()))) {
			Real E = 0.;
			bool count_node = mesh.isLocalOrMasterNode(n);

			if (count_node) {
			E += (flow.array() * time_step).sum();
			}

			ethermal += E;
			}

			mesh.getCommunicator().allReduce(ethermal, SynchronizerOperation::_sum);

			AKANTU_DEBUG_OUT();
			return ethermal;
			}

			/* -------------------------------------------------------------------------- */
			auto DiffusionModel::getEnergy(const ID & energy_id) -> Real {
			AKANTU_DEBUG_IN();
			Real energy = 0;

			for_each_constitutive_law([&energy, &energy_id](auto && constitutive_law) {
			energy += constitutive_law.getEnergy(energy_id);
			});

			// reduction sum over all processors
			mesh.getCommunicator().allReduce(energy, SynchronizerOperation::_sum);

			AKANTU_DEBUG_OUT();
			return energy;
			}

			/* -------------------------------------------------------------------------- */
			auto DiffusionModel::getEnergy(const ID & energy_id, const Element & element)
			-> Real {
			auto constitutive_law_element = element;
			constitutive_law_element.element =
			this->getConstitutiveLawLocalNumbering()(element);

			return this->getConstitutiveLaw(element).getEnergy(energy_id,
			constitutive_law_element);
			}

			/* -------------------------------------------------------------------------- */
			std::shared_ptr<dumpers::Field>
			DiffusionModel::createNodalFieldBool(const std::string & field_name,
			const std::string & group_name,
			bool /padding_flag/) {

			std::map<std::string, Array<bool> *> uint_nodal_fields;
			uint_nodal_fields["blocked_dofs"] = blocked_dofs.get();

			auto field = mesh.createNodalField(uint_nodal_fields[field_name], group_name);
			return field;
			}

			/* -------------------------------------------------------------------------- */
			std::shared_ptr<dumpers::Field> DiffusionModel::createNodalFieldReal(
			const std::string & field_name, const std::string & group_name,
			__attribute__((unused)) bool padding_flag) {

			if (field_name == "capacity_lumped") {
			AKANTU_EXCEPTION(
			"Capacity lumped is a nodal field now stored in the DOF manager."
			"Therefore it cannot be used by a dumper anymore");
			}

			std::map<std::string, Array<Real> *> real_nodal_fields;
			real_nodal_fields[dof_name] = diffusion.get();
			real_nodal_fields[dof_name + "_rate"] = diffusion_rate.get();
			real_nodal_fields["external_flow"] = external_flow.get();
			real_nodal_fields["internal_flow"] = internal_flow.get();
			real_nodal_fields["increment"] = increment.get();

			if (auto it = real_nodal_fields.find(field_name);
			it != real_nodal_fields.end()) {
			return mesh.createNodalField(it->second, group_name);
			}

			return nullptr;
			}

			/* -------------------------------------------------------------------------- */
			std::shared_ptr<dumpers::Field> DiffusionModel::createElementalField(
			const std::string & field_name, const std::string & group_name,
			bool /padding_flag/, Int /spatial_dimension/,
			ElementKind element_kind) {

			std::shared_ptr<dumpers::Field> field;

			if (field_name == "partitions") {
			field = mesh.createElementalField<Int, dumpers::ElementPartitionField>(
			mesh.getConnectivities(), group_name, this->spatial_dimension,
			element_kind);
			}
			bool is_internal = this->isInternal(field_name, element_kind);

			if (is_internal) {
			auto nb_data_per_elem =
			this->getInternalDataPerElem(field_name, element_kind);
			auto & internal_flat = this->flattenInternal(field_name, element_kind);

			field = mesh.createElementalField<Real, dumpers::InternalMaterialField>(
			internal_flat, group_name, spatial_dimension, element_kind,
			nb_data_per_elem);

			// homogenize the field
			auto foo = dumpers::HomogenizerProxy::createHomogenizer(*field);

			field =
			dumpers::FieldComputeProxy::createFieldCompute(field, std::move(foo));
			};

			return field;
			}

			/* -------------------------------------------------------------------------- */
			Int DiffusionModel::getNbData(const Array<Idx> & indexes,
			const SynchronizationTag & tag) const {
			AKANTU_DEBUG_IN();

			Int size = 0;
			auto nb_nodes = indexes.size();

			switch (tag) {
			case SynchronizationTag::_diffusion: {
			size += nb_nodes * Int(sizeof(Real));
			break;
			}
			default: {
			AKANTU_ERROR("Unknown ghost synchronization tag : " << tag);
			}
			}

			AKANTU_DEBUG_OUT();
			return size;
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::packData(CommunicationBuffer & buffer,
			const Array<Idx> & indexes,
			const SynchronizationTag & tag) const {
			AKANTU_DEBUG_IN();

			for (auto index : indexes) {
			switch (tag) {
			case SynchronizationTag::_diffusion: {
			buffer << (*diffusion)(index);
			break;
			}
			default: {
			AKANTU_ERROR("Unknown ghost synchronization tag : " << tag);
			}
			}
			}

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::unpackData(CommunicationBuffer & buffer,
			const Array<Idx> & indexes,
			const SynchronizationTag & tag) {
			AKANTU_DEBUG_IN();

			for (auto index : indexes) {
			switch (tag) {
			case SynchronizationTag::_diffusion: {
			buffer >> (*diffusion)(index);
			break;
			}
			default: {
			AKANTU_ERROR("Unknown ghost synchronization tag : " << tag);
			}
			}
			}

			AKANTU_DEBUG_OUT();
			}

			/* -------------------------------------------------------------------------- */
			Int DiffusionModel::getNbData(const Array<Element> & elements,
			const SynchronizationTag & tag) const {
			AKANTU_DEBUG_IN();

			Int size = 0;
			auto nb_nodes_per_element = 0;

			for (auto && el : elements) {
			nb_nodes_per_element += Mesh::getNbNodesPerElement(el.type);
			}

			if (tag == SynchronizationTag::_diffusion) {
			size += nb_nodes_per_element * Int(sizeof(Real)); // temperature
			}

			size += Parent::getNbData(elements, tag);

			AKANTU_DEBUG_OUT();
			return size;
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::packData(CommunicationBuffer & buffer,
			const Array<Element> & elements,
			const SynchronizationTag & tag) const {
			if (tag == SynchronizationTag::_diffusion) {
			packNodalDataHelper(*diffusion, buffer, elements, mesh);
			}

			Parent::packData(buffer, elements, tag);
			}

			/* -------------------------------------------------------------------------- */
			void DiffusionModel::unpackData(CommunicationBuffer & buffer,
			const Array<Element> & elements,
			const SynchronizationTag & tag) {
			if (tag == SynchronizationTag::_diffusion) {
			unpackNodalDataHelper(*diffusion, buffer, elements, mesh);
			}

			Parent::unpackData(buffer, elements, tag);
			}

			/* -------------------------------------------------------------------------- */
			} // namespace akantu

rAKA/src/model/diffusion_model/diffusion_model.cc1f632f71ba75bugfixes/documentation

diffusion_model.ccView Options

rAKA/src/model/diffusion_model/diffusion_model.cc
1f632f71ba75bugfixes/documentation

diffusion_model.cc
View Options