heat_transfer_model.hh
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Created: Wed, May 1, 16:47

heat_transfer_model.hh
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	/**
	* @file heat_transfer_model.hh
	*
	* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
	* @author Lucas Frerot <lucas.frerot@epfl.ch>
	* @author Srinivasa Babu Ramisetti <srinivasa.ramisetti@epfl.ch>
	* @author Nicolas Richart <nicolas.richart@epfl.ch>
	* @author Rui Wang <rui.wang@epfl.ch>
	*
	* @date creation: Sun May 01 2011
	* @date last modification: Mon Mar 15 2021
	*
	* @brief Model of Heat Transfer
	*
	*
	* @section LICENSE
	*
	* Copyright (©) 2010-2021 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 "data_accessor.hh"
	#include "fe_engine.hh"
	#include "model.hh"
	/* -------------------------------------------------------------------------- */
	#include <array>
	/* -------------------------------------------------------------------------- */

	#ifndef AKANTU_HEAT_TRANSFER_MODEL_HH_
	#define AKANTU_HEAT_TRANSFER_MODEL_HH_

	namespace akantu {
	template <ElementKind kind, class IntegrationOrderFunctor>
	class IntegratorGauss;
	template <ElementKind kind> class ShapeLagrange;
	} // namespace akantu

	namespace akantu {

	class HeatTransferModel : public Model,
	public DataAccessor<Element>,
	public DataAccessor<Idx> {
	/* ------------------------------------------------------------------------ */
	/* Constructors/Destructors */
	/* ------------------------------------------------------------------------ */
	public:
	using FEEngineType = FEEngineTemplate<IntegratorGauss, ShapeLagrange>;

	HeatTransferModel(Mesh & mesh, Int spatial_dimension = _all_dimensions,
	const ID & id = "heat_transfer_model",
	std::shared_ptr<DOFManager> dof_manager = nullptr);

	~HeatTransferModel() override;

	/* ------------------------------------------------------------------------ */
	/* Methods */
	/* ------------------------------------------------------------------------ */
	protected:
	/// generic function to initialize everything ready for explicit dynamics
	void initFullImpl(const ModelOptions & options) override;

	/// read one material file to instantiate all the materials
	void readMaterials();

	/// allocate all vectors
	void initSolver(TimeStepSolverType time_step_solver_type,
	NonLinearSolverType non_linear_solver_type) override;

	/// initialize the model
	void initModel() override;

	void predictor() override;

	/// compute the heat flux
	void assembleResidual() override;

	/// get the type of matrix needed
	MatrixType getMatrixType(const ID & matrix_id) const override;

	/// callback to assemble a Matrix
	void assembleMatrix(const ID & matrix_id) override;

	/// callback to assemble a lumped Matrix
	void assembleLumpedMatrix(const ID & matrix_id) override;

	std::tuple<ID, TimeStepSolverType>
	getDefaultSolverID(const AnalysisMethod & method) override;

	ModelSolverOptions
	getDefaultSolverOptions(const TimeStepSolverType & type) const override;
	/* ------------------------------------------------------------------------ */
	/* Methods for explicit */
	/* ------------------------------------------------------------------------ */
	public:
	/// compute and get the stable time step
	Real getStableTimeStep();

	/// set the stable timestep
	void setTimeStep(Real time_step, const ID & solver_id = "") override;

	// temporary protection to prevent bad usage: should check for bug
	protected:
	/// compute the internal heat flux \todo Need code review: currently not
	/// public method
	void assembleInternalHeatRate();

	public:
	/// calculate the lumped capacity vector for heat transfer problem
	void assembleCapacityLumped();

	public:
	/// assemble the conductivity matrix
	void assembleConductivityMatrix();

	/// assemble the conductivity matrix
	void assembleCapacity();

	/// compute the capacity on quadrature points
	void computeRho(Array<Real> & rho, ElementType type, GhostType ghost_type);

	private:
	/// calculate the lumped capacity vector for heat transfer problem (w
	/// ghost type)
	void assembleCapacityLumped(GhostType ghost_type);

	/// compute the conductivity tensor for each quadrature point in an array
	void computeConductivityOnQuadPoints(GhostType ghost_type);

	/// compute vector \f[k \grad T\f] for each quadrature point
	void computeKgradT(GhostType ghost_type);

	/// compute the thermal energy
	Real computeThermalEnergyByNode();

	/* ------------------------------------------------------------------------ */
	/* Data Accessor inherited members */
	/* ------------------------------------------------------------------------ */
	public:
	inline Int getNbData(const Array<Element> & elements,
	const SynchronizationTag & tag) const override;
	inline void packData(CommunicationBuffer & buffer,
	const Array<Element> & elements,
	const SynchronizationTag & tag) const override;
	inline void unpackData(CommunicationBuffer & buffer,
	const Array<Element> & elements,
	const SynchronizationTag & tag) override;

	inline Int getNbData(const Array<Idx> & indexes,
	const SynchronizationTag & tag) const override;
	inline void packData(CommunicationBuffer & buffer, const Array<Idx> & indexes,
	const SynchronizationTag & tag) const override;
	inline void unpackData(CommunicationBuffer & buffer,
	const Array<Idx> & indexes,
	const SynchronizationTag & tag) override;

	/* ------------------------------------------------------------------------ */
	/* Dumpable interface */
	/* ------------------------------------------------------------------------ */
	public:
	std::shared_ptr<dumpers::Field>
	createNodalFieldReal(const std::string & field_name,
	const std::string & group_name,
	bool padding_flag) override;

	std::shared_ptr<dumpers::Field>
	createNodalFieldBool(const std::string & field_name,
	const std::string & group_name,
	bool padding_flag) override;

	std::shared_ptr<dumpers::Field>
	createElementalField(const std::string & field_name,
	const std::string & group_name, bool padding_flag,
	Int spatial_dimension, ElementKind kind) override;

	/* ------------------------------------------------------------------------ */
	/* Accessors */
	/* ------------------------------------------------------------------------ */
	public:
	AKANTU_GET_MACRO_AUTO(Density, density);
	AKANTU_GET_MACRO_AUTO(Capacity, capacity);
	/// get the dimension of the system space
	AKANTU_GET_MACRO_AUTO(SpatialDimension, spatial_dimension);
	/// get the current value of the time step
	AKANTU_GET_MACRO_AUTO(TimeStep, time_step);
	/// get the assembled heat flux
	AKANTU_GET_MACRO_DEREF_PTR(InternalHeatRate, internal_heat_rate);
	/// get the boundary vector
	AKANTU_GET_MACRO_DEREF_PTR_NOT_CONST(BlockedDOFs, blocked_dofs);
	/// get the external heat rate vector
	AKANTU_GET_MACRO_DEREF_PTR_NOT_CONST(ExternalHeatRate, external_heat_rate);
	/// get the temperature gradient
	AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(TemperatureGradient,
	temperature_gradient, Real);
	/// get the conductivity on q points
	AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(ConductivityOnQpoints,
	conductivity_on_qpoints, Real);
	/// get the conductivity on q points
	AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(TemperatureOnQpoints,
	temperature_on_qpoints, Real);
	/// internal variables
	AKANTU_GET_MACRO_BY_ELEMENT_TYPE_CONST(KgradT, k_gradt_on_qpoints, Real);
	/// get the temperature
	AKANTU_GET_MACRO_DEREF_PTR_NOT_CONST(Temperature, temperature);
	/// get the temperature derivative
	AKANTU_GET_MACRO_DEREF_PTR(TemperatureRate, temperature_rate);

	/// get the energy denominated by thermal
	Real getEnergy(const std::string & energy_id, ElementType type, Idx index);
	/// get the energy denominated by thermal
	Real getEnergy(const std::string & energy_id);

	/// get the thermal energy for a given element
	Real getThermalEnergy(ElementType type, Idx index);
	/// get the thermal energy for a given element
	Real getThermalEnergy();

	protected:
	/* ------------------------------------------------------------------------ */
	FEEngine & getFEEngineBoundary(const ID & name = "") override;

	/* ----------------------------------------------------------------------- */
	template <class iterator, class const_iterator>
	void getThermalEnergy(iterator Eth, const_iterator T_it,
	const_iterator T_end) const;

	/* ------------------------------------------------------------------------ */
	/* Class Members */
	/* ------------------------------------------------------------------------ */
	private:
	/// time step
	Real time_step;

	/// temperatures array
	std::unique_ptr<Array<Real>> temperature;

	/// temperatures derivatives array
	std::unique_ptr<Array<Real>> temperature_rate;

	/// increment array (@f$\delta \dot T@f$ or @f$\delta T@f$)
	std::unique_ptr<Array<Real>> increment;

	/// the density
	Real density;

	/// the speed of the changing temperature
	ElementTypeMapArray<Real> temperature_gradient;

	/// temperature field on quadrature points
	ElementTypeMapArray<Real> temperature_on_qpoints;

	/// conductivity tensor on quadrature points
	ElementTypeMapArray<Real> conductivity_on_qpoints;

	/// vector \f[k \grad T\f] on quad points
	ElementTypeMapArray<Real> k_gradt_on_qpoints;

	/// external flux vector
	std::unique_ptr<Array<Real>> external_heat_rate;

	/// residuals array
	std::unique_ptr<Array<Real>> internal_heat_rate;

	/// boundary vector
	std::unique_ptr<Array<bool>> blocked_dofs;

	// realtime
	// Real time;

	/// capacity
	Real capacity;

	// conductivity matrix
	Matrix<Real> conductivity;

	// linear variation of the conductivity (for temperature dependent
	// conductivity)
	Real conductivity_variation;

	// reference temperature for the interpretation of temperature variation
	Real T_ref;

	// the biggest parameter of conductivity matrix
	// Real conductivitymax;

	bool need_to_reassemble_capacity{true};
	bool need_to_reassemble_capacity_lumped{true};
	Int temperature_release{0};
	Int conductivity_matrix_release{-1};
	std::unordered_map<GhostType, bool> initial_conductivity{{_not_ghost, true},
	{_ghost, true}};
	std::unordered_map<GhostType, Int> conductivity_release{{_not_ghost, 0},
	{_ghost, 0}};
	};

	} // namespace akantu

	#endif /* AKANTU_HEAT_TRANSFER_MODEL_HH_ */

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