NonlinearSolver< Vec, Ops > Class Template Reference

Top-level class for the nonlinear solver. More...

#include <NonlinearSolver.H>

Inheritance diagram for NonlinearSolver< Vec, Ops >:

Public Member Functions
	NonlinearSolver ()=default
virtual	~NonlinearSolver ()=default
	NonlinearSolver (const NonlinearSolver &)=delete
NonlinearSolver &	operator= (const NonlinearSolver &)=delete
	NonlinearSolver (NonlinearSolver &&) noexcept=delete
NonlinearSolver &	operator= (NonlinearSolver &&) noexcept=delete
virtual void	Define (const Vec &, Ops *)=0
	Read user-provided parameters that control the nonlinear solver. Allocate intermediate data containers needed by the solver. For Newton, setup the linear solver for computing the Newton step.
bool	IsDefined () const
	Check if the nonlinear solver has been defined.
virtual void	Solve (Vec &, const Vec &, amrex::Real, amrex::Real, int) const =0
	Solve the specified nonlinear equation for U. Picard: U = b + R(U). Newton: F(U) = U - b - R(U) = 0.
virtual void	PrintParams () const =0
	Print parameters used by the nonlinear solver.
virtual void	GetSolverParams (amrex::Real &, amrex::Real &, int &)=0
	Return the convergence parameters used by the nonlinear solver.
virtual bool	UsePreconditioner ()
	Whether a preconditioner is used by the nonlinear solver.
virtual void	Verbose (bool a_verbose)
	Allow caller to dynamically change the verbosity flag. For example, one may want to only print solver information every 100 steps.

Protected Attributes
bool	m_is_defined = false
bool	m_verbose = true
std::string	m_diagnostic_file
int	m_diagnostic_interval = 1
bool	m_usePC = false

Detailed Description

template<class Vec, class Ops>
class NonlinearSolver< Vec, Ops >

Top-level class for the nonlinear solver.

This class is templated on a vector class Vec, and an operator class Ops.

The Ops class must have the following function: ComputeRHS( R_vec, U_vec, time, nl_iter, from_jacobian ), where U_vec and R_vec are of type Vec.

The Vec class must have basic math operators, such as Copy, +=, -=, increment(), linComb(), scale(), etc.. See WarpXSolverVec.H for an example.

Constructor & Destructor Documentation

NonlinearSolver() [1/3]

template<class Vec, class Ops>

NonlinearSolver< Vec, Ops >::NonlinearSolver ( )

default

~NonlinearSolver()

template<class Vec, class Ops>

virtual NonlinearSolver< Vec, Ops >::~NonlinearSolver ( )

virtualdefault

NonlinearSolver() [2/3]

template<class Vec, class Ops>

NonlinearSolver< Vec, Ops >::NonlinearSolver ( const NonlinearSolver< Vec, Ops > & )

delete

NonlinearSolver() [3/3]

template<class Vec, class Ops>

NonlinearSolver< Vec, Ops >::NonlinearSolver ( NonlinearSolver< Vec, Ops > && )

deletenoexcept

Member Function Documentation

Define()

template<class Vec, class Ops>

virtual void NonlinearSolver< Vec, Ops >::Define ( const Vec & , Ops *  )

pure virtual

Read user-provided parameters that control the nonlinear solver. Allocate intermediate data containers needed by the solver. For Newton, setup the linear solver for computing the Newton step.

Implemented in NewtonSolver< Vec, Ops >, and PicardSolver< Vec, Ops >.

GetSolverParams()

template<class Vec, class Ops>

virtual void NonlinearSolver< Vec, Ops >::GetSolverParams ( amrex::Real & , amrex::Real & , int &  )

pure virtual

Return the convergence parameters used by the nonlinear solver.

Implemented in NewtonSolver< Vec, Ops >, and PicardSolver< Vec, Ops >.

IsDefined()

template<class Vec, class Ops>

bool NonlinearSolver< Vec, Ops >::IsDefined ( ) const

inlinenodiscard

Check if the nonlinear solver has been defined.

operator=() [1/2]

template<class Vec, class Ops>

NonlinearSolver & NonlinearSolver< Vec, Ops >::operator= ( const NonlinearSolver< Vec, Ops > & )

delete

operator=() [2/2]

template<class Vec, class Ops>

NonlinearSolver & NonlinearSolver< Vec, Ops >::operator= ( NonlinearSolver< Vec, Ops > && )

deletenoexcept

PrintParams()

template<class Vec, class Ops>

virtual void NonlinearSolver< Vec, Ops >::PrintParams ( ) const

pure virtual

Print parameters used by the nonlinear solver.

Implemented in NewtonSolver< Vec, Ops >, and PicardSolver< Vec, Ops >.

Solve()

template<class Vec, class Ops>

virtual void NonlinearSolver< Vec, Ops >::Solve ( Vec & , const Vec & , amrex::Real , amrex::Real , int  ) const

pure virtual

Solve the specified nonlinear equation for U. Picard: U = b + R(U). Newton: F(U) = U - b - R(U) = 0.

Implemented in NewtonSolver< Vec, Ops >, and PicardSolver< Vec, Ops >.

UsePreconditioner()

template<class Vec, class Ops>

virtual bool NonlinearSolver< Vec, Ops >::UsePreconditioner ( )

inlinevirtual

Whether a preconditioner is used by the nonlinear solver.

Verbose()

template<class Vec, class Ops>

virtual void NonlinearSolver< Vec, Ops >::Verbose ( bool a_verbose )

inlinevirtual

Allow caller to dynamically change the verbosity flag. For example, one may want to only print solver information every 100 steps.

Member Data Documentation

m_diagnostic_file

template<class Vec, class Ops>

std::string NonlinearSolver< Vec, Ops >::m_diagnostic_file

protected

m_diagnostic_interval

template<class Vec, class Ops>

int NonlinearSolver< Vec, Ops >::m_diagnostic_interval = 1

protected

m_is_defined

template<class Vec, class Ops>

bool NonlinearSolver< Vec, Ops >::m_is_defined = false

protected

m_usePC

template<class Vec, class Ops>

bool NonlinearSolver< Vec, Ops >::m_usePC = false

protected

m_verbose

template<class Vec, class Ops>

bool NonlinearSolver< Vec, Ops >::m_verbose = true

mutableprotected

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

• /home/docs/checkouts/readthedocs.org/user_builds/warpx/checkouts/6102/Source/NonlinearSolvers/NonlinearSolver.H