hydro::Solutions::SmoothFlow< Dim, IsRelativistic > Class Template Reference

Smooth sinusoidal density wave. More...

#include <SmoothFlow.hpp>

Classes
struct	AdiabaticIndex
	The adiabatic index for the ideal fluid. More...
struct	MeanVelocity
	The mean flow velocity. More...
struct	PerturbationSize
	The perturbation amplitude of the rest mass density of the fluid. More...
struct	Pressure
	The constant pressure throughout the fluid. More...
struct	WaveVector
	The wave vector of the profile. More...

Public Member Functions
	SmoothFlow (const SmoothFlow &)=default
SmoothFlow &	operator= (const SmoothFlow &)=default
	SmoothFlow (SmoothFlow &&)=default
SmoothFlow &	operator= (SmoothFlow &&)=default
	SmoothFlow (CkMigrateMessage *)
void	pup (PUP::er &)

Protected Types
using	equation_of_state_type = EquationsOfState::IdealFluid< IsRelativistic >
using	options = implementation defined

Protected Member Functions
	SmoothFlow (const std::array< double, Dim > &mean_velocity, const std::array< double, Dim > &wavevector, double pressure, double adiabatic_index, double perturbation_size)
const EquationsOfState::IdealFluid< IsRelativistic > &	equation_of_state () const
template<typename DataType >
auto	variables (const tnsr::I< DataType, Dim > &x, double t, tmpl::list< hydro::Tags::RestMassDensity< DataType > >) const -> tuples::TaggedTuple< hydro::Tags::RestMassDensity< DataType > >
	Retrieve hydro variable at (x, t)
template<typename DataType >
auto	variables (const tnsr::I< DataType, Dim > &x, double t, tmpl::list< hydro::Tags::SpecificInternalEnergy< DataType > >) const -> tuples::TaggedTuple< hydro::Tags::SpecificInternalEnergy< DataType > >
	Retrieve hydro variable at (x, t)
template<typename DataType >
auto	variables (const tnsr::I< DataType, Dim > &x, double, tmpl::list< hydro::Tags::Pressure< DataType > >) const -> tuples::TaggedTuple< hydro::Tags::Pressure< DataType > >
	Retrieve hydro variable at (x, t)
template<typename DataType >
auto	variables (const tnsr::I< DataType, Dim > &x, double, tmpl::list< hydro::Tags::SpatialVelocity< DataType, Dim > >) const -> tuples::TaggedTuple< hydro::Tags::SpatialVelocity< DataType, Dim > >
	Retrieve hydro variable at (x, t)
template<typename DataType , bool LocalIsRelativistic = IsRelativistic, Requires< IsRelativistic and IsRelativistic==LocalIsRelativistic > = nullptr>
auto	variables (const tnsr::I< DataType, Dim > &x, double, tmpl::list< hydro::Tags::LorentzFactor< DataType > >) const -> tuples::TaggedTuple< hydro::Tags::LorentzFactor< DataType > >
	Retrieve hydro variable at (x, t)
template<typename DataType >
auto	variables (const tnsr::I< DataType, Dim > &x, double t, tmpl::list< hydro::Tags::SpecificEnthalpy< DataType > >) const -> tuples::TaggedTuple< hydro::Tags::SpecificEnthalpy< DataType > >
	Retrieve hydro variable at (x, t)

Friends
template<size_t LocalDim, bool LocalIsRelativistic>
bool	operator== (const SmoothFlow< LocalDim, LocalIsRelativistic > &lhs, const SmoothFlow< LocalDim, LocalIsRelativistic > &rhs)

Detailed Description

template<size_t Dim, bool IsRelativistic>
class hydro::Solutions::SmoothFlow< Dim, IsRelativistic >

Smooth sinusoidal density wave.

This is the generic infrastructure for a smooth flow solution that can be used by the hydro systems to avoid code duplication. The solution has a constant pressure and uniform spatial velocity provided that the rest mass density satisfies the advection equation

$$\begin{array}{r}{\partial }_t\rho +v^i{\partial }_i\rho =0,\end{array}$$

and the specific internal energy is a function of the rest mass density only, $ϵ=ϵ(\rho )$. For testing purposes, this class implements this solution for the case where $\rho$ is a sine wave. The user specifies the mean flow velocity of the fluid, the wavevector of the density profile, and the amplitude $A$ of the density profile. In Cartesian coordinates $(x,y,z)$, and using dimensionless units, the primitive variables at a given time $t$ are then

$$\begin{array}{rl}\rho (\overrightarrow{x},t)& =1+A\sin (\overrightarrow{k}\cdot (\overrightarrow{x}-\overrightarrow{v}t))\\ \overrightarrow{v}(\overrightarrow{x},t)& =[v_x,v_y,v_z{]}^T,\\ P(\overrightarrow{x},t)& =P,\\ ϵ(\overrightarrow{x},t)& =\frac{P}{(\gamma -1)\rho }\end{array}$$

where we have assumed $ϵ$ and $\rho$ to be related through an equation mathematically equivalent to the equation of state of an ideal gas, where the pressure is held constant.

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

• src/PointwiseFunctions/AnalyticSolutions/Hydro/SmoothFlow.hpp