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LevelNodeSolver Class Reference

Solves elliptic equations on a level. More...

#include <LevelNodeSolver.H>

Collaboration diagram for LevelNodeSolver:

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List of all members.

Public Methods

 LevelNodeSolver ()
 {\bf constructors, destructor and defines}

 LevelNodeSolver (const DisjointBoxLayout &a_grids, const DisjointBoxLayout *a_gridsCoarsePtr, const ProblemDomain &a_domain, Real a_dx, int a_refToCoarse, const NodeLevelOp *const a_opin, int a_minLength=1)
 LevelNodeSolver (const DisjointBoxLayout &a_grids, const DisjointBoxLayout *a_gridsCoarsePtr, const Box &a_domain, Real a_dx, int a_refToCoarse, const NodeLevelOp *const a_opin, int a_minLength=1)
virtual ~LevelNodeSolver ()
virtual void define (const DisjointBoxLayout &a_grids, const DisjointBoxLayout *a_gridsCoarsePtr, const ProblemDomain &a_domain, Real a_dx, int a_refToCoarse, const NodeLevelOp *const a_opin, int a_minLength=1)
virtual void define (const DisjointBoxLayout &a_grids, const DisjointBoxLayout *a_gridsCoarsePtr, const Box &a_domain, Real a_dx, int a_refToCoarse, const NodeLevelOp *const a_opin, int a_minLength=1)
bool isDefined () const
 {\bf access functions}

void setnumBottomGSRB (int a_numBottomGSRB)
 {\bf parameter-setting functions}

void setnumSmoothUp (int a_numSmoothUp)
void setnumSmoothDown (int a_numSmoothDown)
void setBottomSmoothing (bool a_bottomSolveFlag)
void setTolerance (Real a_tolerance)
void setOperatorTolerance (Real a_operatorTolerance)
void setVerbose (bool a_verbose)
void setMaxIter (int a_maxIter)
void setMinIter (int a_minIter)
void clearMemory ()
 {\bf data modification functions}

void setDefaultValues ()
void levelSolveH (LevelData< NodeFArrayBox > &a_phi, const LevelData< NodeFArrayBox > &a_rhs, bool a_initializePhiToZero=true)
void levelSolve (LevelData< NodeFArrayBox > &a_phi, const LevelData< NodeFArrayBox > *a_phiCoarse, const LevelData< NodeFArrayBox > &a_rhs, bool a_initializePhiToZero=true)

Protected Attributes

NodeLevelMG m_levelMG
NodeLevelOp * m_levelOpPtr
bool m_isDefined
DisjointBoxLayout m_grids
ProblemDomain m_domain
LevelData< NodeFArrayBox > m_resid
LevelData< NodeFArrayBox > m_scratch
LevelData< NodeFArrayBox > m_corr
int m_refToCoarse
Real m_dx
int m_maxIter
int m_minIter
Real m_tolerance
Real m_operatorTolerance
bool m_bottomSolveFlag
bool m_verbose
LayoutData< Vector< IntVectSet > > m_IVSV
LayoutData< Vector< IntVectSet > > m_IVSVext

Detailed Description

Solves elliptic equations on a level.

LevelNodeSolver solves elliptic equations on a level using multigrid.

Constructor & Destructor Documentation

LevelNodeSolver::LevelNodeSolver (    ) 
 

{\bf constructors, destructor and defines}

Default constructor leaves LevelNodeSolver undefined.

LevelNodeSolver::LevelNodeSolver (  const DisjointBoxLayout &    a_grids,
const DisjointBoxLayout *    a_gridsCoarsePtr,
const ProblemDomain &    a_domain,
Real    a_dx,
int    a_refToCoarse,
const NodeLevelOp *const    a_opin,
int    a_minLength = 1
) 
 

Full constructor. Calls full {\bf define} function with identical arguments.

LevelNodeSolver::LevelNodeSolver (  const DisjointBoxLayout &    a_grids,
const DisjointBoxLayout *    a_gridsCoarsePtr,
const Box &    a_domain,
Real    a_dx,
int    a_refToCoarse,
const NodeLevelOp *const    a_opin,
int    a_minLength = 1
) 
 

virtual LevelNodeSolver::~LevelNodeSolver (    )  [virtual]
 

Destructor.

Member Function Documentation

void LevelNodeSolver::clearMemory (    ) 
 

{\bf data modification functions}

virtual void LevelNodeSolver::define (  const DisjointBoxLayout &    a_grids,
const DisjointBoxLayout *    a_gridsCoarsePtr,
const Box &    a_domain,
Real    a_dx,
int    a_refToCoarse,
const NodeLevelOp *const    a_opin,
int    a_minLength = 1
)  [virtual]
 

virtual void LevelNodeSolver::define (  const DisjointBoxLayout &    a_grids,
const DisjointBoxLayout *    a_gridsCoarsePtr,
const ProblemDomain &    a_domain,
Real    a_dx,
int    a_refToCoarse,
const NodeLevelOp *const    a_opin,
int    a_minLength = 1
)  [virtual]
 

Full define function.

{\bf Arguments:}\ a_grids: Grids on which solution will be computed.\ a_gridsCoarsePtr: pointer to next coarser grids, or NULL if there is no coarser level.\ a_domain: domain of solution level.\ a_dx: grid spacing at solution level.\ a_refToCoarse: refinement ratio to next coarser level. Not used if there is no coarser level.\ a_opin: operator L used in solution of L(phi)=rho.\ a_minLength: minimum side length of maximally coarsened box, or 0 if no coarsening. Set to 1 for max coarsening.\

bool LevelNodeSolver::isDefined (    )  const
 

{\bf access functions}

Returns true if this object was created with the defining constructor or if define() has been called.

void LevelNodeSolver::levelSolve (  LevelData< NodeFArrayBox > &    a_phi,
const LevelData< NodeFArrayBox > *    a_phiCoarse,
const LevelData< NodeFArrayBox > &    a_rhs,
bool    a_initializePhiToZero = true
) 
 

Does a level solve on this level using multigrid and inhomogeneous bcs at interfaces.

{\bf Arguments:} \ a_phi (modified): input initial guess at solution, output solution.\ a_phiCoarse (not modified): pointer to solution at next coarser level, or NULL if there is no coarser level.\ a_rhs (not modified): right-hand side.\ a_initializePhiToZero: whether to initialize guess of phi to zero.\

void LevelNodeSolver::levelSolveH (  LevelData< NodeFArrayBox > &    a_phi,
const LevelData< NodeFArrayBox > &    a_rhs,
bool    a_initializePhiToZero = true
) 
 

Does a level solve on this level using multigrid and homogeneous bcs at coarse/fine interfaces.

{\bf Arguments:} \ a_phi (modified): input initial guess at solution, output solution.\ a_rhs (not modified): right-hand side.\ a_initializePhiToZero: whether to initialize guess of phi to zero.\

void LevelNodeSolver::setBottomSmoothing (  bool    a_bottomSolveFlag ) 
 

Sets whether smoothing is done at bottom level. Default is true.

void LevelNodeSolver::setDefaultValues (    ) 
 

void LevelNodeSolver::setMaxIter (  int    a_maxIter ) 
 

Sets max number of multigrid V-cycles to use in solution; Default is 33.

void LevelNodeSolver::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 LevelNodeSolver::setnumBottomGSRB (  int    a_numBottomGSRB ) 
 

{\bf parameter-setting functions}

Set number of smoothings on the bottom level; Default == 16. Passed to NodeLevelMG.

void LevelNodeSolver::setnumSmoothDown (  int    a_numSmoothDown ) 
 

Set number of smoothings on way down V-cycle; Default == 4. Passed to NodeLevelMG.

void LevelNodeSolver::setnumSmoothUp (  int    a_numSmoothUp ) 
 

Set number of smoothings on way up V-cycle; Default == 4. Passed to NodeLevelMG.

void LevelNodeSolver::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-4.

void LevelNodeSolver::setTolerance (  Real    a_tolerance ) 
 

Sets solution tolerance. Default is 1.0e-10.

void LevelNodeSolver::setVerbose (  bool    a_verbose ) 
 

Sets whether the solver gives output while solving. Default is false.

Member Data Documentation

bool LevelNodeSolver::m_bottomSolveFlag [protected]
 

LevelData<NodeFArrayBox> LevelNodeSolver::m_corr [protected]
 

ProblemDomain LevelNodeSolver::m_domain [protected]
 

Real LevelNodeSolver::m_dx [protected]
 

DisjointBoxLayout LevelNodeSolver::m_grids [protected]
 

bool LevelNodeSolver::m_isDefined [protected]
 

LayoutData< Vector<IntVectSet> > LevelNodeSolver::m_IVSV [protected]
 

LayoutData< Vector<IntVectSet> > LevelNodeSolver::m_IVSVext [protected]
 

NodeLevelMG LevelNodeSolver::m_levelMG [protected]
 

NodeLevelOp* LevelNodeSolver::m_levelOpPtr [protected]
 

int LevelNodeSolver::m_maxIter [protected]
 

int LevelNodeSolver::m_minIter [protected]
 

Real LevelNodeSolver::m_operatorTolerance [protected]
 

int LevelNodeSolver::m_refToCoarse [protected]
 

LevelData<NodeFArrayBox> LevelNodeSolver::m_resid [protected]
 

LevelData<NodeFArrayBox> LevelNodeSolver::m_scratch [protected]
 

Real LevelNodeSolver::m_tolerance [protected]
 

bool LevelNodeSolver::m_verbose [protected]
 

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