SBH.FVSolver Class Reference

A finite volume solver. More...

Inheritance diagram for SBH.FVSolver:

Collaboration diagram for SBH.FVSolver:

Public Member Functions
	__init__ (self, name, patch_size, min_cell_size, max_cell_size)
	Construct the Finite Volume solver.
	create_action_sets (self)
	Tailor action set behaviour.
Public Member Functions inherited from CCZ4Solver.CCZ4Solver_FV_GlobalAdaptiveTimeStepWithEnclaveTasking
	add_tracer (self, name, coordinates, project, number_of_entries_between_two_db_flushes, data_delta_between_two_snapsots, time_delta_between_two_snapsots, clear_database_after_flush, tracer_unknowns)
	Add tracer to project.
Public Member Functions inherited from CCZ4Solver.AbstractCCZ4Solver
	enable_second_order (self)
	add_all_solver_constants (self)
	Add domain-specific constants.
	add_makefile_parameters (self, peano4_project, path_of_ccz4_application)
	Add include path and minimal required cpp files to makefile.

Additional Inherited Members
Data Fields inherited from CCZ4Solver.AbstractCCZ4Solver
	integer_constants
	double_constants
	Default_Time_Step_Size_Relaxation
Static Public Attributes inherited from CCZ4Solver.AbstractCCZ4Solver
float	Default_Time_Step_Size_Relaxation = 0.1
Protected Member Functions inherited from CCZ4Solver.AbstractCCZ4Solver
	_add_standard_includes (self)
	Add the headers for the compute kernels and initial condition implementations.
Static Protected Attributes inherited from CCZ4Solver.AbstractCCZ4Solver
dict	_FO_formulation_unknowns
dict	_SO_formulation_unknowns

Detailed Description

A finite volume solver.

This solver is not appropriate to simulate black holes as a stand-alone solver, as it is way too diffusive. If you use it without another scheme, you typically see the black hole disappear after a brief period. So we have it in here merely for performance tests.

Definition at line 692 of file SBH.py.

Constructor & Destructor Documentation

__init__()

SBH.FVSolver.__init__	(		self,
			name,
			patch_size,
			min_cell_size,
			max_cell_size )

Construct the Finite Volume solver.

Parameters

patch_size	Integer Defines how big the individual patches are. If you pass in 10, each Finite Volume patch will have the dimensions 10x10x10.
min_cell_size	Float This parameter refers to the cell size, i.e. the size of a whole patch. We use this one here, to make the signature the same as for the FD and DG solver variants. The superclass constructor argues over finite volume sizes, and we hence have to recalibrate this parameter with patch_size.

Reimplemented from CCZ4Solver.CCZ4Solver_FV_GlobalAdaptiveTimeStepWithEnclaveTasking.

Definition at line 704 of file SBH.py.

References SBH.FVSolver.__init__(), CCZ4Solver.AbstractCCZ4Solver.add_all_solver_constants(), CCZ4Solver.AbstractCCZ4Solver.double_constants, and SBH.update_solver_parameters_for_single_black_hole().

Referenced by SBH.FVSolver.__init__().

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Member Function Documentation

create_action_sets()

SBH.FVSolver.create_action_sets

(

self

)

Tailor action set behaviour.

We first make a few additional cells skeleton cells. The rationale behind additional skeletons is given in the generic overview. Given the first remark there on FD4-FV coupling, one would be tempted to use the predicate

self._action_set_update_cell.additional_skeleton_guard = " " "(
  repositories::instanceOf" " " + self._name_without_FD4_extension + " " "_FV.isCellOverlappingWithBHImpactArea(marker)
  and
  not repositories::instanceOf" " " + self._name_without_FD4_extension + " " "_FV.areAllFaceConnectedCellsOverlappingWithBHImpactArea(marker)
)
" " "

Once we study the other items (notably the fourth), we see that it is reasonable to make all the overlap region a skeleton within the FD4 solver.

Definition at line 754 of file SBH.py.

References SBH.FVSolver.create_action_sets().

Referenced by mgccz4.MGCCZ4Solver.add_derivative_calculation(), ccz4.CCZ4Solver.add_Psi4W(), and SBH.FVSolver.create_action_sets().

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

• benchmarks/ccz4/single-black-hole/SBH.py