Reduces oscillations inside an element in an attempt to guarantee a physical solution of the conserved variables for which the primitive variables can be recovered. More...

#include <Flattener.hpp>

Classes
struct	RecoverPrimitives
	If true, then the primitive variables are updated at the end of the function. More...

struct	RequirePhysicalMeanTildeTau
	Require that the mean of TildeTau is physical, otherwise terminate the simulation. More...

struct	RequirePositiveMeanTildeD
	Require that the mean of TildeD is positive, otherwise terminate the simulation. More...

struct	RequirePositiveMeanTildeYe
	Require that the mean of TildeYe is positive, otherwise terminate the simulation. More...

Public Types
using	options = implementation defined

using	return_tags = implementation defined

using	argument_tags = implementation defined

Public Member Functions
	Flattener (bool require_positive_mean_tilde_d, bool require_positive_mean_tilde_ye, bool require_physical_mean_tilde_tau, bool recover_primitives)

	Flattener (const Flattener &)=default

Flattener &	operator= (const Flattener &)=default

	Flattener (Flattener &&)=default

Flattener &	operator= (Flattener &&)=default

void	pup (PUP::er &p)

void	operator() (gsl::not_null< Scalar< DataVector > * > tilde_d, gsl::not_null< Scalar< DataVector > * > tilde_ye, gsl::not_null< Scalar< DataVector > * > tilde_tau, gsl::not_null< tnsr::i< DataVector, 3 > * > tilde_s, gsl::not_null< Variables< hydro::grmhd_tags< DataVector > > * > primitives, const tnsr::I< DataVector, 3, Frame::Inertial > &tilde_b, const Scalar< DataVector > &tilde_phi, const Scalar< DataVector > &sqrt_det_spatial_metric, const tnsr::ii< DataVector, 3, Frame::Inertial > &spatial_metric, const tnsr::II< DataVector, 3, Frame::Inertial > &inv_spatial_metric, const Mesh< 3 > &mesh, const Scalar< DataVector > &det_logical_to_inertial_inv_jacobian, const EquationsOfState::EquationOfState< true, 3 > &eos, const grmhd::ValenciaDivClean::PrimitiveFromConservativeOptions &primitive_from_conservative_options) const

Static Public Attributes
static constexpr Options::String	help

Friends
template<typename LocalRecoverySchemesList >
bool	operator== (const Flattener< LocalRecoverySchemesList > &lhs, const Flattener< LocalRecoverySchemesList > &rhs)

Detailed Description

template<typename RecoverySchemesList>
class grmhd::ValenciaDivClean::Flattener< RecoverySchemesList >

Reduces oscillations inside an element in an attempt to guarantee a physical solution of the conserved variables for which the primitive variables can be recovered.

The algorithm uses the conditions of FixConservatives on $\tilde{D}$ and $\tilde{τ}$ to reduce oscillations inside an element. Oscillations are reduced by rescaling the conserved variables about the mean to bring them into the required range. When rescaling $\tilde{D}$ because it is negative, it is important to also rescale $\tilde{τ}$ and ${\tilde{S}}_{i}$ by the same amount. At least, this is what is observed in the cylindrical blast wave test problem.

This currently doesn't use the check on ${\tilde{S}}^{2}$ , but instead checks that the primitive variables can be recovered. If the primitives cannot be recovered then we flatten to the mean values in the element.

Member Data Documentation

◆ help

template<typename RecoverySchemesList >

constexpr Options::String grmhd::ValenciaDivClean::Flattener< RecoverySchemesList >::help

staticconstexpr

Initial value:

= {
      "Reduces oscillations (flattens) the conserved variables according to "
      "the variable fixing procedure described in Foucart's thesis.\n"}

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

src/Evolution/Systems/GrMhd/ValenciaDivClean/Flattener.hpp

Classes

Public Types

Public Member Functions

Static Public Attributes

Friends

Detailed Description

Member Data Documentation

◆ help