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AMRSolver Class Reference

Class which manages grid hierarchy and composite elliptic solution. More...

#include <AMRSolver.H>

Collaboration diagram for AMRSolver:

Public Methods
	AMRSolver ()
	AMRSolver (const Vector< DisjointBoxLayout > &a_gridsLevel, const Vector< Box > &a_domainLevel, const Vector< Real > &a_dxLevel, const Vector< int > &a_refRatio, int a_numLevels, int a_lBase, const LevelOp *const a_opin, int ncomp=1)
	AMRSolver (const Vector< DisjointBoxLayout > &a_gridsLevel, const Vector< ProblemDomain > &a_domainLevel, const Vector< Real > &a_dxLevel, const Vector< int > &a_refRatio, int a_numLevels, int a_lBase, const LevelOp *const a_opin, int ncomp=1)
void	define (const Vector< DisjointBoxLayout > &a_gridsLevel, const Vector< Box > &a_domainLevel, const Vector< Real > &a_dxLevel, const Vector< int > &a_refRatio, int a_numLevels, int a_lBase, const LevelOp *const a_opin, int ncomp=1)
void	define (const Vector< DisjointBoxLayout > &a_gridsLevel, const Vector< ProblemDomain > &a_domainLevel, const Vector< Real > &a_dxLevel, const Vector< int > &a_refRatio, int a_numLevels, int a_lBase, const LevelOp *const a_opin, int ncomp=1)
	~AMRSolver ()
bool	isDefined () const
void	setNumSmoothUp (int a_numSmoothUp)
void	setNumSmoothDown (int a_numSmoothDown)
void	setTolerance (Real a_tolerance)
void	setOperatorTolerance (Real a_operatorTolerance)
void	setMaxIter (int a_maxIter)
void	setMinIter (int a_minIter)
void	setNumVCyclesBottom (int a_numVCycleBottom)
void	solveAMR (Vector< LevelData< FArrayBox > * > &a_phiLevel, const Vector< LevelData< FArrayBox > * > &a_rhsLevel)
	Solves on hierarchy to tolerance m_tolerance.
void	AMRVCycleMG (Vector< LevelData< FArrayBox > * > &a_corrLevel, const Vector< LevelData< FArrayBox > * > &a_residLevel)
Vector< Real >	computeResidualNorm (Vector< LevelData< FArrayBox > * > &a_phiLevel, const Vector< LevelData< FArrayBox > * > &a_rhsLevel, int normNtype)
Vector< Real >	computeResidualNorm (Vector< LevelData< FArrayBox > * > &a_residLevel, Vector< LevelData< FArrayBox > * > &a_phiLevel, const Vector< LevelData< FArrayBox > * > &a_rhsLevel, int normNtype)
void	computeAMRResidual (Vector< LevelData< FArrayBox > * > &a_phiLevel, const Vector< LevelData< FArrayBox > * > &a_rhsLevel, LevelData< FArrayBox > &res, int ilev)
void	applyAMROperator (Vector< LevelData< FArrayBox > * > &a_phiLevel, LevelData< FArrayBox > &a_LofPhi, int a_ilev)
void	applyAMROperatorHphys (Vector< LevelData< FArrayBox > * > &a_phiLevel, LevelData< FArrayBox > &a_LofPhi, int a_ilev)
void	setVerbose (bool a_verbose)
Protected Methods
void	setDefaultValues ()
void	clear ()
Protected Attributes
Real	m_errorTolerance
Real	m_tolerance
Real	m_operatorTolerance
int	m_numLevels
int	m_finestLevel
Vector< int >	m_refRatio
Vector< Real >	m_dxLevel
Vector< DisjointBoxLayout >	m_gridsLevel
Vector< ProblemDomain >	m_domainLevel
int	m_maxIter
int	m_minIter
int	m_numSmoothUp
int	m_numVCyclesBottom
int	m_numSmoothDown
Vector< AMRLevelMG * >	m_amrmgLevel
bool	m_isDefined
LevelSolver	m_levelSolver
int	m_lBase
int	m_ncomp
bool	m_verbose
Friends
class	AMRLevelMG

Detailed Description

Class which manages grid hierarchy and composite elliptic solution.

AMRSolver manages the AMR/multigrid solution to the elliptic equation on a multiple level grid that satisfies certain proper nesting conditions. It can be used either as a solver, or to apply the AMR / multigrid V-cycle as a preconditioner for some other iterative method, such as a Krylov method.

Constructor & Destructor Documentation

AMRSolver::AMRSolver ( )

Creates a AMRSolver whose internal state is undefined. Need to call define(...) function to use any of the functionality of the class

AMRSolver::AMRSolver ( const Vector< DisjointBoxLayout > & a_gridsLevel,

const Vector< Box > & a_domainLevel,

const Vector< Real > & a_dxLevel,

const Vector< int > & a_refRatio,

int a_numLevels,

int a_lBase,

const LevelOp *const a_opin,

int ncomp = 1

)

Creates a fully-defined AMRSolver. Calls define function with identical arguments

AMRSolver::AMRSolver ( const Vector< DisjointBoxLayout > & a_gridsLevel,

const Vector< ProblemDomain > & a_domainLevel,

const Vector< Real > & a_dxLevel,

const Vector< int > & a_refRatio,

int a_numLevels,

int a_lBase,

const LevelOp *const a_opin,

int ncomp = 1

)

Creates a fully-defined AMRSolver. Calls define function with identical arguments

AMRSolver::~AMRSolver ( )

Member Function Documentation

void AMRSolver::AMRVCycleMG ( Vector< LevelData< FArrayBox > * > & a_corrLevel,

const Vector< LevelData< FArrayBox > * > & a_residLevel

)

Does one relaxation V-cycle using a MG solver. Problem is assumed to already be in residual-correction form. \ {\bf Inputs:} \ corrLevel - pointers to current guess at the correction values for levels lMin = max(lBase-1,0) ... lMax. Vector index corresponds to level number. \ residLevel - pointers to AMR residual for levels lMin ... lMax. Vector index corresponds to level number. \{\bf Outputs:} \ corrLevel - LevelData<FArrayBox>s pointed to for levels lMin,...,lMax are updated in place.

void AMRSolver::applyAMROperator ( Vector< LevelData< FArrayBox > * > & a_phiLevel,

LevelData< FArrayBox > & a_LofPhi,

int a_ilev

)

Calculate multilevel L(phi). includes refluxing and all that This is the three-level operator.

void AMRSolver::applyAMROperatorHphys ( Vector< LevelData< FArrayBox > * > & a_phiLevel,

LevelData< FArrayBox > & a_LofPhi,

int a_ilev

)

Calculate multilevel L(phi) with homogeneous physical BCs (but with inhomogeneous C/F BCs). includes refluxing and all that This is the three-level operator.

void AMRSolver::clear ( ) [protected]

void AMRSolver::computeAMRResidual ( Vector< LevelData< FArrayBox > * > & a_phiLevel,

const Vector< LevelData< FArrayBox > * > & a_rhsLevel,

LevelData< FArrayBox > & res,

int ilev

)

Calculate multilevel residual on level ilev.

Vector<Real> AMRSolver::computeResidualNorm ( Vector< LevelData< FArrayBox > * > & a_residLevel,

Vector< LevelData< FArrayBox > * > & a_phiLevel,

const Vector< LevelData< FArrayBox > * > & a_rhsLevel,

int normNtype

)

Calculate norm of multilevel residual on levels lBase to lmax. Does not include data covered by finer levels. Also returns residual in argument a_residLevel.

Vector<Real> AMRSolver::computeResidualNorm ( Vector< LevelData< FArrayBox > * > & a_phiLevel,

const Vector< LevelData< FArrayBox > * > & a_rhsLevel,

int normNtype

)

Calculate norm of multilevel residual on levels lBase to lmax. Does not include data covered by finer levels.

void AMRSolver::define ( const Vector< DisjointBoxLayout > & a_gridsLevel,

const Vector< ProblemDomain > & a_domainLevel,

const Vector< Real > & a_dxLevel,

const Vector< int > & a_refRatio,

int a_numLevels,

int a_lBase,

const LevelOp *const a_opin,

int ncomp = 1

)

Defines AMRSolvers' internal state \ {\bf Inputs:} \ gridsLevel --- The grids at all levels. Each element in the vector is a level's worth of grids. gridsLevel[0] are grids for level 0 and so forth. Vector index corresponds to level number. \ domainLevel --- The domains at all levels. Each element in the vector is a level's domain. domainLevel[0] is the domain for level 0 and so forth. Vector index corresponds to level number. \ dxLevel --- The grid spacing at all levels. Each element in the vector is a level's $\dx$. dxLevel[0]--- is $\dx$ for level 0 and so forth. Vector index corresponds to level number. \ ref_ratio--- The refinement ratio between all levels. ref_ratio[0] is the refinement ratio between level 0 and level 1; Vector index corresponds to level number. \ numlevels The number of AMR levels in the calculation. The length of the Vector~s has to be at least numlevels.
\ lBase - coarsest level on which solution is to be computed. This needs to be set at the time of definition, in order to build the bottom LevelSolver. \ opin_a The levelop to use in the solution.

void AMRSolver::define ( const Vector< DisjointBoxLayout > & a_gridsLevel,

const Vector< Box > & a_domainLevel,

const Vector< Real > & a_dxLevel,

const Vector< int > & a_refRatio,

int a_numLevels,

int a_lBase,

const LevelOp *const a_opin,

int ncomp = 1

)

Defines AMRSolvers' internal state \ {\bf Inputs:} \ gridsLevel --- The grids at all levels. Each element in the vector is a level's worth of grids. gridsLevel[0] are grids for level 0 and so forth. Vector index corresponds to level number. \ domainLevel --- The domains at all levels. Each element in the vector is a level's domain. domainLevel[0] is the domain for level 0 and so forth. Vector index corresponds to level number. \ dxLevel --- The grid spacing at all levels. Each element in the vector is a level's $\dx$. dxLevel[0]--- is $\dx$ for level 0 and so forth. Vector index corresponds to level number. \ ref_ratio--- The refinement ratio between all levels. ref_ratio[0] is the refinement ratio between level 0 and level 1; Vector index corresponds to level number. \ numlevels The number of AMR levels in the calculation. The length of the Vector~s has to be at least numlevels.
\ lBase - coarsest level on which solution is to be computed. This needs to be set at the time of definition, in order to build the bottom LevelSolver. \ opin_a The levelop to use in the solution.

bool AMRSolver::isDefined ( ) const

Returns true if full define function has been called.

void AMRSolver::setDefaultValues ( ) [protected]

void AMRSolver::setMaxIter ( int a_maxIter )

Set max number of iterations. Default is 42.

void AMRSolver::setMinIter ( int a_minIter )

Set min number of iterations. Only relevant when residual is not decreasing fast enough to satisfy the "operator tolerance". Default is 4.

void AMRSolver::setNumSmoothDown ( int a_numSmoothDown )

Set number of multigrid smoothings on way down v-cycle; Default is 4.

void AMRSolver::setNumSmoothUp ( int a_numSmoothUp )

Set number of multigrid smoothings on way up v-cycle. Default is 4

void AMRSolver::setNumVCyclesBottom ( int a_numVCycleBottom )

Set the number of v-cycles performed from the base level to the maximum coarsening of the base level during one overall v-cycle on the AMR hierarchy. Default is 1.

void AMRSolver::setOperatorTolerance ( Real a_operatorTolerance )

Set "operator tolerance" of iterative solution. Iteration will stop if (new_residual/old_residual) > 1-operatorTolerance (and at least minIter iterations have been performed). Default is 1.0e-5.

void AMRSolver::setTolerance ( Real a_tolerance )

Set tolerance of iterative solution. Default is 1.0e-10.

void AMRSolver::setVerbose ( bool a_verbose )

set whether the solver does i/o while solving. default is true

void AMRSolver::solveAMR ( Vector< LevelData< FArrayBox > * > & a_phiLevel,

const Vector< LevelData< FArrayBox > * > & a_rhsLevel

)

Solves on hierarchy to tolerance m_tolerance.
Solves the elliptic equation over the hierarchy of levels lBase ... lMax where $lMax = numlevels-1$. If lBase > 0, then the data at level lBase - 1 is used to interpolate boundary conditions at boundary cells that are not adjacent to the domain boundary. \{\bf Inputs:} \ phiLevel - pointers to current guess at the solution values for levels (lMin = max(lBase-1,0)) ... lMax. Vector index corresponds to level number. \ rhsLevel - pointers to right-hand side for levels lmin ... lMax. Vector index corresponds to level number. \{\bf Outputs:} \ phiLevel - LevelData<FArrayBox>s pointed to for levels lMin,...,lMax are updated in place.

Friends And Related Function Documentation

friend class AMRLevelMG [friend]

Member Data Documentation

Vector<AMRLevelMG*> AMRSolver::m_amrmgLevel [protected]

Vector<ProblemDomain> AMRSolver::m_domainLevel [protected]

Vector<Real> AMRSolver::m_dxLevel [protected]

Real AMRSolver::m_errorTolerance [protected]

int AMRSolver::m_finestLevel [protected]

Vector<DisjointBoxLayout> AMRSolver::m_gridsLevel [protected]

bool AMRSolver::m_isDefined [protected]

int AMRSolver::m_lBase [protected]

LevelSolver AMRSolver::m_levelSolver [protected]

int AMRSolver::m_maxIter [protected]

int AMRSolver::m_minIter [protected]

int AMRSolver::m_ncomp [protected]

int AMRSolver::m_numLevels [protected]

int AMRSolver::m_numSmoothDown [protected]

int AMRSolver::m_numSmoothUp [protected]

int AMRSolver::m_numVCyclesBottom [protected]

Real AMRSolver::m_operatorTolerance [protected]

Vector<int> AMRSolver::m_refRatio [protected]

Real AMRSolver::m_tolerance [protected]

bool AMRSolver::m_verbose [protected]

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

AMRSolver.H

Generated on Thu Aug 29 11:07:35 2002 for Chombo&INS by

1.2.16

AMRSolver Class Reference

Public Methods

Protected Methods

Protected Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation