Generic Navier-Stokes solver in the presence of immersed boundaries. More...

#include <NSWithBody.h>

Inheritance diagram for NSWithBody< memoryType >:

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Collaboration diagram for NSWithBody< memoryType >:

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Public Member Functions
virtual void	writeCommon ()
	Writes flow variables and position of body points into files. More...

virtual void	shutDown ()
	Closes iteration file and force file. More...

Public Member Functions inherited from NavierStokesSolver< memoryType >
	NavierStokesSolver (parameterDB pDB=NULL, domain dInfo=NULL)
	Constructor. Copies the database and information about the computational grid. More...

virtual void	initialise ()
	Initializes parameters, arrays and matrices required for the simulation. More...

void	stepTime ()
	Calculates the variables at the next time step. More...

virtual void	writeData ()
	Writes data into files. More...

bool	finished ()
	Evaluates the condition required to stop the simulation. More...

virtual std::string	name ()
	Returns the name of the current solver. More...

Protected Member Functions
virtual void	calculateForce ()

void	initialiseBodies ()
	Stores the parameters of the simulation and initializes the location and motion of each immersed bodies. More...

void	updateBodies ()
	Updates location and motion of each immersed body at current time. More...

template<>
void	calculateForce ()
	Calculates forces acting on an immersed body. More...

Protected Member Functions inherited from NavierStokesSolver< memoryType >
void	initialiseCommon ()
	Initializes parameters common to all Navier-Stokes solvers. More...

void	initialiseArrays (int numQ, int numLambda)
	Initializes all arrays required to solve the Navier-Stokes equations. More...

virtual void	initialiseFluxes ()

virtual void	initialiseFluxes (real *q)
	Initializes velocity flux vectors. More...

void	initialiseBoundaryArrays ()
	Initializes boundary velocity arrays with values stored in the database. More...

void	assembleMatrices ()
	Assembles matrices of the intermediate flux solver and the Poisson solver. More...

void	generateM ()

virtual void	generateL ()

virtual void	generateA (real alpha)

void	generateBN ()
	Generates approximate inverse of the matrix resulting from implicit velocity terms. More...

virtual void	generateQT ()

void	updateQ (real gamma)
	Doing nothing. More...

virtual void	generateC ()

void	generateRN ()
	Generates explicit terms of the momentum equation. More...

void	calculateExplicitQTerms ()

virtual void	calculateExplicitLambdaTerms ()
	Doing nothing. Used in methods that use the explicit pressure term in the intermediate velocity solve step, such as FadlunEtAlSolver and DFModifiedSolver. More...

virtual void	generateBC1 ()

virtual void	generateBC2 ()

virtual void	assembleRHS1 ()
	Assembles the right hand-side of the system for the intermediate flux. More...

void	assembleRHS2 ()
	Assembles the right hand-side of the Poisson system. More...

virtual void	solveIntermediateVelocity ()
	Solves for the intermediate flux velocity. More...

virtual void	solvePoisson ()
	Solves the Poisson system. More...

virtual void	projectionStep ()
	Projects the flux onto the divergence-free field. More...

void	updateBoundaryConditions ()
	Doing nothing. More...

virtual void	updateSolverState ()
	Doing nothing. Used in immersed boundary methods when the body moves. More...

template<>
void	generateA (real alpha)
	Assembles the matrix from implicit terms of momentum equation. More...

template<>
void	generateBC1 ()
	Generates inhomogeneous boundary conditions from the discrete Laplacian operator. More...

template<>
void	generateBC2 ()
	Generates inhomogeneous boundary conditions from the discrete continuity equation. More...

template<>
void	generateL ()
	Generates the discrete Laplacian matrix. More...

template<>
void	generateM ()
	Generates the mass matrix and its inverse. More...

template<>
void	generateQT ()
	Generates the discrete divergence matrix. More...

template<>
void	calculateExplicitQTerms ()
	Generates explicit terms that arise from the velocity fluxes. More...

template<>
void	initialiseFluxes ()
	Initializes velocity flux vectors (on the device). More...

template<>
void	generateC ()
	Generates the matrix of the Poisson solver. More...

Protected Attributes
bodies< memoryType >	B
	bodies in the flow More...

real	forceX
	force acting on each body in the x-direction More...

real	forceY
	force acting on each body in the y-direction More...

std::ofstream	forceFile
	file to write the forces More...

Protected Attributes inherited from NavierStokesSolver< memoryType >
parameterDB *	paramDB
	database that contains all the simulation parameters More...

domain *	domInfo
	computational grid information More...

integrationScheme	intgSchm
	instance of the class `integrationScheme` More...

real	QCoeff

cusp::coo_matrix< int, real, memoryType >	M
	diagonal mass matrix More...

cusp::coo_matrix< int, real, memoryType >	Minv
	inverse of the mass matrix More...

cusp::coo_matrix< int, real, memoryType >	L
	discrete Laplacian matrix More...

cusp::coo_matrix< int, real, memoryType >	A
	combination of mass and Laplacian matrices More...

cusp::coo_matrix< int, real, memoryType >	Q
	gradient matrix (and regularization matrix if immersed body) More...

cusp::coo_matrix< int, real, memoryType >	QT
	transposed gradient matrix (and interpolation matrix if immersed body) More...

cusp::coo_matrix< int, real, memoryType >	BN
	N-th order Taylor series expansion of the inverse of `A`. More...

cusp::coo_matrix< int, real, memoryType >	C
	matrix of the Poisson system More...

cusp::array1d< real, memoryType >	q
	velocity flux vector More...

cusp::array1d< real, memoryType >	qStar
	intermediate velocity flux vector More...

cusp::array1d< real, memoryType >	qOld
	velocity flux vector at the previous time-step More...

cusp::array1d< real, memoryType >	lambda
	pressure vector (and body forces if immersed body) More...

cusp::array1d< real, memoryType >	rn
	explicit terms of the momentum equation More...

cusp::array1d< real, memoryType >	bc1
	inhomogeneous boundary conditions from the discrete Laplacian operator More...

cusp::array1d< real, memoryType >	bc2
	inhomogeneous boundary conditions from the discrete continuity equation More...

cusp::array1d< real, memoryType >	rhs1
	right hand-side of the system for the intermediate velocity flux vector More...

cusp::array1d< real, memoryType >	rhs2
	right hand-side of the Poisson system More...

cusp::array1d< real, memoryType >	H
	hold convective terms from previous time step More...

cusp::array1d< real, memoryType >	temp1
	temporary 1D Cusp array More...

cusp::array1d< real, memoryType >	temp2
	temporary 1D Cusp array More...

cusp::array1d< real, memoryType >	bc [4]
	array that contains the boundary conditions of the rectangular domain More...

preconditioner< cusp::coo_matrix< int, real, memoryType > > *	PC1
	preconditioner for the intermediate flux solver More...

preconditioner< cusp::coo_matrix< int, real, memoryType > > *	PC2
	preconditioner for the Poisson solver More...

size_t	timeStep
	iteration number More...

size_t	subStep
	number of sub-iterations More...

size_t	iterationCount1
	number of iteration to solve the intermediate fluxes More...

size_t	iterationCount2
	number of iteration to solve the Poisson equation More...

Logger	logger
	instance of the class `Logger` to track time of different tasks More...

std::ofstream	iterationsFile
	file that contains the number of iterations More...

Detailed Description

template<typename memoryType>
class NSWithBody< memoryType >

Generic Navier-Stokes solver in the presence of immersed boundaries.

The class inherits from the class NavierStokesSolver.

Definition at line 21 of file NSWithBody.h.

Member Function Documentation

template<typename memoryType>

virtual void NSWithBody< memoryType >::calculateForce ( )

protectedvirtual

Reimplemented in TairaColoniusSolver< memoryType >.

Referenced by DirectForcingSolver< memoryType >::writeData().

template<>

void NSWithBody< device_memory >::calculateForce ( )

protected

Calculates forces acting on an immersed body.

Uses the control volume approach explained by Lai and Peskin (2000). This is a general method that can be used with any immersed boundary method. It uses only the velocity and pressure fields to calculate the forces, and does not involve any body forces on the immersed boundary. Currently works only for one body.

Definition at line 68 of file NSWithBody.cu.

References kernels::forceX(), and kernels::forceY().

template<typename memoryType >

void NSWithBody< memoryType >::initialiseBodies ( )

protected

Stores the parameters of the simulation and initializes the location and motion of each immersed bodies.

Definition at line 16 of file NSWithBody.cu.

References NavierStokesSolver< memoryType >::initialise().

Referenced by TairaColoniusSolver< memoryType >::initialise(), and DirectForcingSolver< memoryType >::initialise().

template<typename memoryType >

void NSWithBody< memoryType >::shutDown ( )

virtual