StepChoosers::ElementSizeCfl< Dim, System > Class Template Reference

Sets a goal based on the CFL stability criterion, but uses the full size of the element as the length scale in question. More...

#include <ElementSizeCfl.hpp>

Classes
struct	SafetyFactor

Public Types
using	options = tmpl::list<SafetyFactor>
using	argument_tags
using	compute_tags

Public Member Functions
	ElementSizeCfl (const double safety_factor)
TimeStepRequest	operator() (const TimeStepper &time_stepper, const std::array< double, Dim > &element_size, const double speed, const double last_step) const
bool	uses_local_data () const override
	Whether the result can differ on different elements, so requiring communication to synchronize the result across the domain. This is ignored for LTS step changing.
bool	can_be_delayed () const override
	Whether the result can be applied with a delay.
void	pup (PUP::er &p) override
Public Member Functions inherited from StepChooser< StepChooserUse::Slab >
	WRAPPED_PUPable_abstract (StepChooser)
TimeStepRequest	desired_step (const double last_step, const db::DataBox< DbTags > &box) const
	The last_step parameter describes the step size to be adjusted. It may be the step size or the slab size, or may be infinite if the appropriate size cannot be determined.
Public Member Functions inherited from StepChooser< StepChooserUse::LtsStep >
	WRAPPED_PUPable_abstract (StepChooser)
TimeStepRequest	desired_step (const double last_step, const db::DataBox< DbTags > &box) const
	The last_step parameter describes the step size to be adjusted. It may be the step size or the slab size, or may be infinite if the appropriate size cannot be determined.

Static Public Attributes
static constexpr Options::String	help

Detailed Description

template<size_t Dim, typename System>
class StepChoosers::ElementSizeCfl< Dim, System >

Sets a goal based on the CFL stability criterion, but uses the full size of the element as the length scale in question.

This is useful as a coarse estimate for slabs, or to place a ceiling on another dynamically-adjusted step chooser.

Member Typedef Documentation

argument_tags

template<size_t Dim, typename System>

using StepChoosers::ElementSizeCfl< Dim, System >::argument_tags

Initial value:

 
      tmpl::list<::Tags::TimeStepper<TimeStepper>,
                 domain::Tags::SizeOfElement<Dim>,
                 typename System::compute_largest_characteristic_speed::base>

compute_tags

template<size_t Dim, typename System>

using StepChoosers::ElementSizeCfl< Dim, System >::compute_tags

Initial value:

 
      tmpl::list<domain::Tags::SizeOfElementCompute<Dim>,
                 typename System::compute_largest_characteristic_speed>

Member Function Documentation

can_be_delayed()

template<size_t Dim, typename System>

bool StepChoosers::ElementSizeCfl< Dim, System >::can_be_delayed ( ) const

inlineoverridevirtual

Whether the result can be applied with a delay.

StepChoosers setting the .end or .end_hard_limit fields of TimeStepRequest must return false here.

Implements StepChooser< StepChooserUse::Slab >.

uses_local_data()

template<size_t Dim, typename System>

bool StepChoosers::ElementSizeCfl< Dim, System >::uses_local_data ( ) const

inlineoverridevirtual

Whether the result can differ on different elements, so requiring communication to synchronize the result across the domain. This is ignored for LTS step changing.

Note

As this is only used for slab-size changing, the last_step passed to the call operator is not considered local data.

Implements StepChooser< StepChooserUse::Slab >.

Member Data Documentation

help

template<size_t Dim, typename System>

Options::String StepChoosers::ElementSizeCfl< Dim, System >::help

staticconstexpr

Initial value:

{
      "Sets a goal based on the CFL stability criterion, but in which "
      "the entire size of the element is used as the spacing in the "
      "computation. This is useful primarily for placing a ceiling on another "
      "dynamically-adjusted step chooser"}

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

• src/Time/StepChoosers/ElementSizeCfl.hpp