Class where it is implemented a reduced problem for the unsteady Navier-stokes problem. More...

#include <ReducedUnsteadyNSTurbIntrusive.H>

Inheritance diagram for ReducedUnsteadyNSTurbIntrusive:

Public Member Functions
	ReducedUnsteadyNSTurbIntrusive ()
	Construct Null.

	ReducedUnsteadyNSTurbIntrusive (UnsteadyNSTurbIntrusive &problem)
	Construct Null.

	~ReducedUnsteadyNSTurbIntrusive ()

void	solveOnline (Eigen::MatrixXd vel)
	Method to perform an online solve using an intrusive approach.

void	solveOnlinePPE (Eigen::MatrixXd vel)
	Method to perform an online solve using an intrusive approach with the usage of PPE.

void	reconstruct (bool exportFields=false, fileName folder="./online_rec")
	Method to reconstruct the solutions from an online solve with a fully uniform approach.

void	reconstructPPE (bool exportFields=false, fileName folder="./online_rec")
	Method to reconstruct the solutions from an online solve with a PPE semi-uniform approach.

Eigen::MatrixXd	setOnlineVelocity (Eigen::MatrixXd vel)
	Sets the online velocity.

void	reconstructLiftAndDrag (UnsteadyNSTurbIntrusive &problem, fileName folder)
	Method to compute the reduced order forces for same number of modes of velocity and pressure.

Public Member Functions inherited from reducedUnsteadyNS
	reducedUnsteadyNS ()
	Construct Null.

	reducedUnsteadyNS (unsteadyNS &problem)
	Construct Null.

	~reducedUnsteadyNS ()

Eigen::MatrixXd	penalty_PPE (Eigen::MatrixXd &vel_now, Eigen::MatrixXd &tauIter, int startSnap=0)
	Method to determine the penalty factors iteratively.

Eigen::MatrixXd	penalty_sup (Eigen::MatrixXd &vel_now, Eigen::MatrixXd &tauIter, int startSnap=0)
	Method to determine the penalty factors iteratively.

void	solveOnline_PPE (Eigen::MatrixXd vel_now, int startSnap=0)
	Method to perform an online solve using a PPE stabilisation method.

void	solveOnline_sup (Eigen::MatrixXd vel_now, int startSnap=0)
	Method to perform an online solve using a supremizer stabilisation method.

void	reconstruct (bool exportFields=false, fileName folder="./online_rec")
	Method to reconstruct the solutions from an online solve with a supremizer stabilisation technique.

Eigen::MatrixXd	setOnlineVelocity (Eigen::MatrixXd vel)
	Sets the online velocity.

Public Member Functions inherited from reducedSteadyNS
	reducedSteadyNS ()
	Construct Null.

	reducedSteadyNS (steadyNS &problem)
	Construct Null.

	~reducedSteadyNS ()

void	solveOnline_PPE (Eigen::MatrixXd vel_now)
	Method to perform an online solve using a PPE stabilisation method.

void	solveOnline_sup (Eigen::MatrixXd vel_now)
	Method to perform an online solve using a supremizer stabilisation method.

void	reconstruct_PPE (fileName folder="./ITHACAoutput/online_rec", int printevery=1)
	Method to reconstruct a solution from an online solve with a PPE stabilisation technique.

void	reconstruct (bool exportFields=false, fileName folder="./ITHACAoutput/online_rec", int printevery=1)
	Method to reconstruct the solutions from an online solve.

void	reconstructLiftAndDrag (steadyNS &problem, fileName folder)
	Method to compute the reduced order forces.

double	inf_sup_constant ()
	Method to evaluate the online inf-sup constant.

Eigen::MatrixXd	setOnlineVelocity (Eigen::MatrixXd vel)
	Sets the online velocity.

Public Member Functions inherited from reducedProblem
	reducedProblem ()
	Construct Null.

virtual	~reducedProblem ()

	reducedProblem (reductionProblem &problem)
	Construct with reduced Problem.

virtual void	solveOnline ()
	Virtual Method to perform and online Solve.

Public Attributes
UnsteadyNSTurbIntrusive *	problem
	Pointer to the FOM problem.

PtrList< volScalarField >	nutModes
	List of pointers to store the modes for the eddy viscosity.

newtonUnsteadyNSTurbIntrusive	newtonObject
	Function object to call the non linear solver sup approach.

newtonUnsteadyNSTurbIntrusivePPE	newtonObjectPPE
	Function object to call the non linear solver sup approach.

Eigen::MatrixXd	initCond
	Tha matrix containing the initial conditions for the reduced variables, in case of PPE approach it must be one column with the head being the degrees of freedom of velocity adn the tail the ones of pressure.

PtrList< volScalarField >	nutRecFields
	Reconstructed eddy viscosity fields list.

Public Attributes inherited from reducedUnsteadyNS
newton_unsteadyNS_sup	newton_object_sup
	Function object to call the non linear solver sup approach.

newton_unsteadyNS_PPE	newton_object_PPE
	Function object to call the non linear solver PPE approach.

scalar	time
	Scalar to store the current time.

double	dt
	Scalar to store the time increment.

scalar	finalTime
	Scalar to store the final time if the online simulation.

scalar	tstart
	Scalar to store the initial time if the online simulation.

double	storeEvery
	A variable for storing the reduced coefficients.

double	exportEvery
	A variable for exporting the fields.

bool	startFromZero = false
	A variable for starting solving the reduced system from zero or not.

int	timeStepPenalty = 1
	Number of timesteps calculated for the iterative penalty method.

Eigen::MatrixXd	tauIter
	Penalty Factor determined with iterative solver.

scalar	maxIterPenalty
	Maximum number of iterations to be done for the computation of the penalty factor.

scalar	tolerancePenalty
	Tolerance for the residual of the boundary values, there is the same tolerance for velocity and temperature.

unsteadyNS *	problem
	Pointer to the FOM problem.

Public Attributes inherited from reducedSteadyNS
ITHACAparameters *	para
	parameters to be read from the ITHACAdict file

Eigen::MatrixXd	vel_now
	Online inlet velocity vector.

Eigen::MatrixXd	fTau
	Reduced matrix for tangent forces.

Eigen::MatrixXd	fN
	Reduced matrix for normal forces.

Eigen::VectorXd	y_old
	Vector to store the previous solution during the Newton procedure.

Eigen::VectorXd	y
	Vector to store the solution during the Newton procedure.

scalar	nu
	Reduced viscosity in case of parametrized viscosity.

List< Eigen::MatrixXd >	online_solution
	List of Eigen matrices to store the online solution.

PtrList< volVectorField >	Umodes
	List of pointers to store the modes for velocity.

PtrList< volScalarField >	Pmodes
	List of pointers to store the modes for pressure.

PtrList< volVectorField >	Usnapshots
	List of pointers to store the snapshots for velocity.

PtrList< volScalarField >	Psnapshots
	List of pointers to store the snapshots for pressure.

PtrList< volScalarField >	PREC
	Reconstructed pressure field.

PtrList< volVectorField >	UREC
	Recontructed velocity field.

PtrList< volScalarField >	pRecFields
	Reconstructed pressure fields list.

PtrList< volVectorField >	uRecFields
	Recontructed velocity fields list.

newton_steadyNS	newton_object
	Newton object used to solve the non linear problem.

steadyNS *	problem
	Pointer to the FOM problem.

int	Nphi_u
	Number of velocity modes.

int	Nphi_p
	Number of pressure modes.

int	Nphi_sup
	Number of supremizer modes.

int	N_BC
	Number of parametrized boundary conditions.

int	count_online_solve = 1
	Counter to count the online solutions.

Eigen::MatrixXd	tauU
	Penalty Factor.

Public Attributes inherited from reducedProblem
scalar	nu
	Viscosity.

reductionProblem *	problem
	Pointer to FOAM problem.

Additional Inherited Members
Static Public Member Functions inherited from reducedProblem
static Eigen::MatrixXd	solveLinearSys (List< Eigen::MatrixXd > LinSys, Eigen::MatrixXd x, Eigen::VectorXd &residual, const Eigen::MatrixXd &bc=Eigen::MatrixXd::Zero(0, 0), const std::string solverType="fullPivLu")
	Linear system solver for the online problem.

static Eigen::MatrixXd	solveLinearSys (List< Eigen::MatrixXd > LinSys, Eigen::MatrixXd x, Eigen::VectorXd &residual, const std::string solverType)
	Linear system solver for the online problem.

Detailed Description

Class where it is implemented a reduced problem for the unsteady Navier-stokes problem.

In this class are implemented the methods to solve a reduced version of the stationary Navier-stokes equations. This class must be used together with the steadyNS class

Definition at line 109 of file ReducedUnsteadyNSTurbIntrusive.H.

Constructor & Destructor Documentation

◆ ReducedUnsteadyNSTurbIntrusive() [1/2]

ReducedUnsteadyNSTurbIntrusive::ReducedUnsteadyNSTurbIntrusive ( )

Construct Null.

Definition at line 41 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ ReducedUnsteadyNSTurbIntrusive() [2/2]

ReducedUnsteadyNSTurbIntrusive::ReducedUnsteadyNSTurbIntrusive ( UnsteadyNSTurbIntrusive & problem )

explicit

Construct Null.

Parameters

problem a full order UnsteadyNSTurbIntrusive problem

Definition at line 45 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ ~ReducedUnsteadyNSTurbIntrusive()

ReducedUnsteadyNSTurbIntrusive::~ReducedUnsteadyNSTurbIntrusive ( )

inline

Definition at line 123 of file ReducedUnsteadyNSTurbIntrusive.H.

Member Function Documentation

◆ reconstruct()

void ReducedUnsteadyNSTurbIntrusive::reconstruct	(	bool	exportFields = false,
		fileName	folder = "./online_rec" )

Method to reconstruct the solutions from an online solve with a fully uniform approach.

Parameters

[in]	exportFields	A boolean variable which determines whether to export fields or not
[in]	folder	The folder where to output the solutions in case on wants to

Definition at line 548 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ reconstructLiftAndDrag()

void ReducedUnsteadyNSTurbIntrusive::reconstructLiftAndDrag	(	UnsteadyNSTurbIntrusive &	problem,
		fileName	folder )

Method to compute the reduced order forces for same number of modes of velocity and pressure.

Parameters

	problem	A UnsteadyNSTurbIntrusive full order problem.
[in]	folder	The folder where to output the forces matrices

Definition at line 685 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ reconstructPPE()

void ReducedUnsteadyNSTurbIntrusive::reconstructPPE	(	bool	exportFields = false,
		fileName	folder = "./online_rec" )

Method to reconstruct the solutions from an online solve with a PPE semi-uniform approach.

Parameters

[in]	exportFields	A boolean variable which determines whether to export fields or not
[in]	folder	The folder where to output the solutions in case on wants to

Definition at line 606 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ setOnlineVelocity()

Eigen::MatrixXd ReducedUnsteadyNSTurbIntrusive::setOnlineVelocity ( Eigen::MatrixXd vel )

Sets the online velocity.

Parameters

[in] vel The velocity

Returns: The rescaled velocity vector

Definition at line 664 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ solveOnline()

void ReducedUnsteadyNSTurbIntrusive::solveOnline ( Eigen::MatrixXd vel )

Method to perform an online solve using an intrusive approach.

Parameters

[in] vel The velocity

Definition at line 253 of file ReducedUnsteadyNSTurbIntrusive.C.

◆ solveOnlinePPE()

void ReducedUnsteadyNSTurbIntrusive::solveOnlinePPE ( Eigen::MatrixXd vel )

Method to perform an online solve using an intrusive approach with the usage of PPE.

Parameters

[in] velNow The vector of online velocity. It is defined in with an Eigen::MatrixXd and must have one col and as many rows as the number of parametrized boundary conditions.

Definition at line 400 of file ReducedUnsteadyNSTurbIntrusive.C.

Member Data Documentation

◆ initCond

Eigen::MatrixXd ReducedUnsteadyNSTurbIntrusive::initCond

Tha matrix containing the initial conditions for the reduced variables, in case of PPE approach it must be one column with the head being the degrees of freedom of velocity adn the tail the ones of pressure.

Definition at line 140 of file ReducedUnsteadyNSTurbIntrusive.H.

◆ newtonObject

newtonUnsteadyNSTurbIntrusive ReducedUnsteadyNSTurbIntrusive::newtonObject

Function object to call the non linear solver sup approach.

Definition at line 132 of file ReducedUnsteadyNSTurbIntrusive.H.

◆ newtonObjectPPE

newtonUnsteadyNSTurbIntrusivePPE ReducedUnsteadyNSTurbIntrusive::newtonObjectPPE

Function object to call the non linear solver sup approach.

Definition at line 135 of file ReducedUnsteadyNSTurbIntrusive.H.

◆ nutModes

PtrList<volScalarField> ReducedUnsteadyNSTurbIntrusive::nutModes

List of pointers to store the modes for the eddy viscosity.

Definition at line 129 of file ReducedUnsteadyNSTurbIntrusive.H.

◆ nutRecFields

PtrList<volScalarField> ReducedUnsteadyNSTurbIntrusive::nutRecFields

Reconstructed eddy viscosity fields list.

Definition at line 143 of file ReducedUnsteadyNSTurbIntrusive.H.

◆ problem

UnsteadyNSTurbIntrusive* ReducedUnsteadyNSTurbIntrusive::problem

Pointer to the FOM problem.

Definition at line 126 of file ReducedUnsteadyNSTurbIntrusive.H.

The documentation for this class was generated from the following files:

/github/workspace/src/ITHACA_ROMPROBLEMS/ReducedUnsteadyNSTurbIntrusive/ReducedUnsteadyNSTurbIntrusive.H
/github/workspace/src/ITHACA_ROMPROBLEMS/ReducedUnsteadyNSTurbIntrusive/ReducedUnsteadyNSTurbIntrusive.C

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ReducedUnsteadyNSTurbIntrusive() [1/2]

◆ ReducedUnsteadyNSTurbIntrusive() [2/2]

◆ ~ReducedUnsteadyNSTurbIntrusive()

Member Function Documentation

◆ reconstruct()

◆ reconstructLiftAndDrag()

◆ reconstructPPE()

◆ setOnlineVelocity()

◆ solveOnline()

◆ solveOnlinePPE()

Member Data Documentation

◆ initCond

◆ newtonObject

◆ newtonObjectPPE

◆ nutModes

◆ nutRecFields

◆ problem