exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions Class Reference

Dirichlet boundary conditions: given a position x outside of the domain and a time stamp t, write the prescribed solution Q there. More...

Inheritance diagram for exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions:

Collaboration diagram for exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions:

Data Structures
class	Generator
	DirichletBoundaryConditions-specific code generation. More...

Public Member Functions
	__init__ (self, str implementation=None, bool stateless=False)
Public Member Functions inherited from exahype2.api.PDETerm.PDETerm
str	__repr__ (self)
str	__str__ (self)
"PDETerm.Generator"	generator (self)
	Code generator for this term: an instance of this term's own (possibly subclass-specific) Generator.

Static Public Attributes
tuple	SIGNATURE
str	NAME = "dirichletBoundaryConditions"
Static Public Attributes inherited from exahype2.api.PDETerm.PDETerm
str	NAME
str	SIGNATURE

Additional Inherited Members
Data Fields inherited from exahype2.api.PDETerm.PDETerm
	name
	implementation
	stateless

Detailed Description

Dirichlet boundary conditions: given a position x outside of the domain and a time stamp t, write the prescribed solution Q there.

virtual void dirichletBoundaryConditions(
  const tarch::la::Vector<Dimensions, double>& x,
  double                                       t,
  double* __restrict__                         Q // Q[{{NUMBER_OF_UNKNOWNS}}+{{NUMBER_OF_AUXILIARY_VARIABLES}}]
);

Different to the legacy boundaryConditions() (

See also

python/exahype2/solvers/fv/SingleSweepAbstract.template.h), the term is not handed the solution inside the domain, the face's normal or the mesh size. It is parameterised through position and time only.

A Finite Volume scheme such as exahype2.api.fv.RusanovWithExplicitEuler evaluates the term at the centres of the ghost volumes, i.e. of the volumes of the halo layer which lie outside of the domain, and stores the result in the face data its reconstruction reads from (

See also

exahype2.api.fv.actionsets.ApplyDirichletBoundaryConditions). t is the time stamp of the solution that the time step is about to advance.

A solver needs this term if and only if at least one axis of the domain is not periodic (

See also

exahype2.api.Project.set_global_simulation_parameters()). If all axes are periodic, the term is never invoked, and the time step does not contain any boundary handling at all.

Only the non-stateless variant is supported at the moment, i.e. the term has to be added with stateless=False.

Definition at line 8 of file DirichletBoundaryConditions.py.

Constructor & Destructor Documentation

__init__()

exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.__init__	(		self,
		str	implementation = None,
		bool	stateless = False
	)

Parameters

implementation	str A C++ snippet that becomes dirichletBoundaryConditions()'s body, or None (the default) to leave dirichletBoundaryConditions() pure virtual for you to implement by hand.
stateless	bool Has to be False at the moment,

See also

the class documentation.

Reimplemented from exahype2.api.PDETerm.PDETerm.

Definition at line 52 of file DirichletBoundaryConditions.py.

References exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.__init__(), exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.NAME, exahype2.api.blockstructured.SommerfeldBoundaryConditions.SommerfeldBoundaryConditions.NAME, exahype2.api.Flux.Flux.NAME, exahype2.api.GradientRefinement.GradientRefinement.NAME, exahype2.api.InitPointWisely.InitPointWisely.NAME, exahype2.api.MassMatrix.MassMatrix.NAME, exahype2.api.MaxEigenvalue.MaxEigenvalue.NAME, exahype2.api.NonconservativeProduct.NonconservativeProduct.NAME, exahype2.api.PDETerm.PDETerm.NAME, exahype2.api.PointSource.PointSource.NAME, exahype2.api.RefineErasePointwisely.RefineErasePointwisely.NAME, and exahype2.api.VolumetricSource.VolumetricSource.NAME.

Referenced by exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.__init__().

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Field Documentation

NAME

str exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.NAME = "dirichletBoundaryConditions"

static

Definition at line 50 of file DirichletBoundaryConditions.py.

Referenced by exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.__init__(), exahype2.api.Flux.Flux.__init__(), exahype2.api.GradientRefinement.GradientRefinement.__init__(), exahype2.api.InitPointWisely.InitPointWisely.__init__(), exahype2.api.MassMatrix.MassMatrix.__init__(), exahype2.api.MaxEigenvalue.MaxEigenvalue.__init__(), exahype2.api.NonconservativeProduct.NonconservativeProduct.__init__(), exahype2.api.PointSource.PointSource.__init__(), exahype2.api.RefineErasePointwisely.RefineErasePointwisely.__init__(), exahype2.api.VolumetricSource.VolumetricSource.__init__(), and exahype2.api.blockstructured.SommerfeldBoundaryConditions.SommerfeldBoundaryConditions.__init__().

SIGNATURE

tuple exahype2.api.blockstructured.DirichletBoundaryConditions.DirichletBoundaryConditions.SIGNATURE

static

Initial value:

=  (
        "const tarch::la::Vector<Dimensions, double>& x, "
        "double t, "
        "double* __restrict__ Q"
    )

Definition at line 44 of file DirichletBoundaryConditions.py.

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

• src/exahype2/api/blockstructured/DirichletBoundaryConditions.py