MFEM  v4.4.0
Finite element discretization library
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mfem::ParAdvectorCGOper Class Reference

Performs a single remap advection step in parallel. More...

#include <tmop_tools.hpp>

Inheritance diagram for mfem::ParAdvectorCGOper:
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Collaboration diagram for mfem::ParAdvectorCGOper:
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Public Member Functions

 ParAdvectorCGOper (const Vector &x_start, GridFunction &vel, ParFiniteElementSpace &pfes, AssemblyLevel al=AssemblyLevel::LEGACY, MemoryType mt=MemoryType::DEFAULT)
 
virtual void Mult (const Vector &ind, Vector &di_dt) const
 Perform the action of the operator: y = k = f(x, t), where k solves the algebraic equation F(x, k, t) = G(x, t) and t is the current time. More...
 
- Public Member Functions inherited from mfem::TimeDependentOperator
 TimeDependentOperator (int n=0, double t_=0.0, Type type_=EXPLICIT)
 Construct a "square" TimeDependentOperator y = f(x,t), where x and y have the same dimension n. More...
 
 TimeDependentOperator (int h, int w, double t_=0.0, Type type_=EXPLICIT)
 Construct a TimeDependentOperator y = f(x,t), where x and y have dimensions w and h, respectively. More...
 
virtual double GetTime () const
 Read the currently set time. More...
 
virtual void SetTime (const double t_)
 Set the current time. More...
 
bool isExplicit () const
 True if type is EXPLICIT. More...
 
bool isImplicit () const
 True if type is IMPLICIT or HOMOGENEOUS. More...
 
bool isHomogeneous () const
 True if type is HOMOGENEOUS. More...
 
EvalMode GetEvalMode () const
 Return the current evaluation mode. See SetEvalMode() for details. More...
 
virtual void SetEvalMode (const EvalMode new_eval_mode)
 Set the evaluation mode of the time-dependent operator. More...
 
virtual void ExplicitMult (const Vector &x, Vector &y) const
 Perform the action of the explicit part of the operator, G: y = G(x, t) where t is the current time. More...
 
virtual void ImplicitMult (const Vector &x, const Vector &k, Vector &y) const
 Perform the action of the implicit part of the operator, F: y = F(x, k, t) where t is the current time. More...
 
virtual void ImplicitSolve (const double dt, const Vector &x, Vector &k)
 Solve the equation: k = f(x + dt k, t), for the unknown k at the current time t. More...
 
virtual OperatorGetImplicitGradient (const Vector &x, const Vector &k, double shift) const
 Return an Operator representing (dF/dk shift + dF/dx) at the given x, k, and the currently set time. More...
 
virtual OperatorGetExplicitGradient (const Vector &x) const
 Return an Operator representing dG/dx at the given point x and the currently set time. More...
 
virtual int SUNImplicitSetup (const Vector &x, const Vector &fx, int jok, int *jcur, double gamma)
 Setup the ODE linear system \( A(x,t) = (I - gamma J) \) or \( A = (M - gamma J) \), where \( J(x,t) = \frac{df}{dt(x,t)} \). More...
 
virtual int SUNImplicitSolve (const Vector &b, Vector &x, double tol)
 Solve the ODE linear system \( A x = b \) as setup by the method SUNImplicitSetup(). More...
 
virtual int SUNMassSetup ()
 Setup the mass matrix in the ODE system \( M y' = f(y,t) \) . More...
 
virtual int SUNMassSolve (const Vector &b, Vector &x, double tol)
 Solve the mass matrix linear system \( M x = b \) as setup by the method SUNMassSetup(). More...
 
virtual int SUNMassMult (const Vector &x, Vector &v)
 Compute the mass matrix-vector product \( v = M x \) . More...
 
virtual ~TimeDependentOperator ()
 
- Public Member Functions inherited from mfem::Operator
void InitTVectors (const Operator *Po, const Operator *Ri, const Operator *Pi, Vector &x, Vector &b, Vector &X, Vector &B) const
 Initializes memory for true vectors of linear system. More...
 
 Operator (int s=0)
 Construct a square Operator with given size s (default 0). More...
 
 Operator (int h, int w)
 Construct an Operator with the given height (output size) and width (input size). More...
 
int Height () const
 Get the height (size of output) of the Operator. Synonym with NumRows(). More...
 
int NumRows () const
 Get the number of rows (size of output) of the Operator. Synonym with Height(). More...
 
int Width () const
 Get the width (size of input) of the Operator. Synonym with NumCols(). More...
 
int NumCols () const
 Get the number of columns (size of input) of the Operator. Synonym with Width(). More...
 
virtual MemoryClass GetMemoryClass () const
 Return the MemoryClass preferred by the Operator. More...
 
virtual void MultTranspose (const Vector &x, Vector &y) const
 Action of the transpose operator: y=A^t(x). The default behavior in class Operator is to generate an error. More...
 
virtual OperatorGetGradient (const Vector &x) const
 Evaluate the gradient operator at the point x. The default behavior in class Operator is to generate an error. More...
 
virtual void AssembleDiagonal (Vector &diag) const
 Computes the diagonal entries into diag. Typically, this operation only makes sense for linear Operators. In some cases, only an approximation of the diagonal is computed. More...
 
virtual const OperatorGetProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to input vectors for the operator. NULL means identity. More...
 
virtual const OperatorGetRestriction () const
 Restriction operator from input vectors for the operator to linear algebra (linear system) vectors. NULL means identity. More...
 
virtual const OperatorGetOutputProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to output vectors for the operator. NULL means identity. More...
 
virtual const OperatorGetOutputRestrictionTranspose () const
 Transpose of GetOutputRestriction, directly available in this form to facilitate matrix-free RAP-type operators. More...
 
virtual const OperatorGetOutputRestriction () const
 Restriction operator from output vectors for the operator to linear algebra (linear system) vectors. NULL means identity. More...
 
void FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B, int copy_interior=0)
 Form a constrained linear system using a matrix-free approach. More...
 
void FormRectangularLinearSystem (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B)
 Form a column-constrained linear system using a matrix-free approach. More...
 
virtual void RecoverFEMSolution (const Vector &X, const Vector &b, Vector &x)
 Reconstruct a solution vector x (e.g. a GridFunction) from the solution X of a constrained linear system obtained from Operator::FormLinearSystem() or Operator::FormRectangularLinearSystem(). More...
 
void FormSystemOperator (const Array< int > &ess_tdof_list, Operator *&A)
 Return in A a parallel (on truedofs) version of this square operator. More...
 
void FormRectangularSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Operator *&A)
 Return in A a parallel (on truedofs) version of this rectangular operator (including constraints). More...
 
void FormDiscreteOperator (Operator *&A)
 Return in A a parallel (on truedofs) version of this rectangular operator. More...
 
void PrintMatlab (std::ostream &out, int n, int m=0) const
 Prints operator with input size n and output size m in Matlab format. More...
 
virtual void PrintMatlab (std::ostream &out) const
 Prints operator in Matlab format. More...
 
virtual ~Operator ()
 Virtual destructor. More...
 
Type GetType () const
 Return the type ID of the Operator class. More...
 

Protected Attributes

const Vectorx0
 
Vectorx_now
 
GridFunctionu
 
VectorGridFunctionCoefficient u_coeff
 
ParBilinearForm M
 
ParBilinearForm K
 
const AssemblyLevel al
 
- Protected Attributes inherited from mfem::TimeDependentOperator
double t
 Current time. More...
 
Type type
 Describes the form of the TimeDependentOperator. More...
 
EvalMode eval_mode
 Current evaluation mode. More...
 
- Protected Attributes inherited from mfem::Operator
int height
 Dimension of the output / number of rows in the matrix. More...
 
int width
 Dimension of the input / number of columns in the matrix. More...
 

Additional Inherited Members

- Public Types inherited from mfem::TimeDependentOperator
enum  Type { EXPLICIT, IMPLICIT, HOMOGENEOUS }
 
enum  EvalMode { NORMAL, ADDITIVE_TERM_1, ADDITIVE_TERM_2 }
 Evaluation mode. See SetEvalMode() for details. More...
 
- Public Types inherited from mfem::Operator
enum  DiagonalPolicy { DIAG_ZERO, DIAG_ONE, DIAG_KEEP }
 Defines operator diagonal policy upon elimination of rows and/or columns. More...
 
enum  Type {
  ANY_TYPE, MFEM_SPARSEMAT, Hypre_ParCSR, PETSC_MATAIJ,
  PETSC_MATIS, PETSC_MATSHELL, PETSC_MATNEST, PETSC_MATHYPRE,
  PETSC_MATGENERIC, Complex_Operator, MFEM_ComplexSparseMat, Complex_Hypre_ParCSR
}
 Enumeration defining IDs for some classes derived from Operator. More...
 
- Protected Member Functions inherited from mfem::Operator
void FormConstrainedSystemOperator (const Array< int > &ess_tdof_list, ConstrainedOperator *&Aout)
 see FormSystemOperator() More...
 
void FormRectangularConstrainedSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, RectangularConstrainedOperator *&Aout)
 see FormRectangularSystemOperator() More...
 
OperatorSetupRAP (const Operator *Pi, const Operator *Po)
 Returns RAP Operator of this, using input/output Prolongation matrices Pi corresponds to "P", Po corresponds to "Rt". More...
 

Detailed Description

Performs a single remap advection step in parallel.

Definition at line 101 of file tmop_tools.hpp.

Constructor & Destructor Documentation

mfem::ParAdvectorCGOper::ParAdvectorCGOper ( const Vector x_start,
GridFunction vel,
ParFiniteElementSpace pfes,
AssemblyLevel  al = AssemblyLevel::LEGACY,
MemoryType  mt = MemoryType::DEFAULT 
)

Here pfes is the ParFESpace of the function that will be moved. Note that Mult() moves the nodes of the mesh corresponding to pfes. mt is used to set the memory type of the integrators.

Definition at line 231 of file tmop_tools.cpp.

Member Function Documentation

void mfem::ParAdvectorCGOper::Mult ( const Vector x,
Vector y 
) const
virtual

Perform the action of the operator: y = k = f(x, t), where k solves the algebraic equation F(x, k, t) = G(x, t) and t is the current time.

Reimplemented from mfem::TimeDependentOperator.

Definition at line 261 of file tmop_tools.cpp.

Member Data Documentation

const AssemblyLevel mfem::ParAdvectorCGOper::al
protected

Definition at line 109 of file tmop_tools.hpp.

ParBilinearForm mfem::ParAdvectorCGOper::K
mutableprotected

Definition at line 108 of file tmop_tools.hpp.

ParBilinearForm mfem::ParAdvectorCGOper::M
mutableprotected

Definition at line 108 of file tmop_tools.hpp.

GridFunction& mfem::ParAdvectorCGOper::u
protected

Definition at line 106 of file tmop_tools.hpp.

VectorGridFunctionCoefficient mfem::ParAdvectorCGOper::u_coeff
protected

Definition at line 107 of file tmop_tools.hpp.

const Vector& mfem::ParAdvectorCGOper::x0
protected

Definition at line 104 of file tmop_tools.hpp.

Vector& mfem::ParAdvectorCGOper::x_now
protected

Definition at line 105 of file tmop_tools.hpp.


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