SpECTRE  v2022.12.02
EquationsOfState::HybridEos< ColdEquationOfState > Class Template Reference

Hybrid equation of state combining a barotropic EOS for cold (zero-temperature) part with a simple thermal part. More...

#include <HybridEos.hpp>

struct  ColdEos

## Public Types

using options = tmpl::list< ColdEos, ThermalAdiabaticIndex >

## Public Member Functions

HybridEos (const HybridEos &)=default

HybridEosoperator= (const HybridEos &)=default

HybridEos (HybridEos &&)=default

HybridEosoperator= (HybridEos &&)=default

HybridEos (ColdEquationOfState cold_eos, double thermal_adiabatic_index)

WRAPPED_PUPable_decl_base_template (SINGLE_ARG(EquationOfState< is_relativistic, 2 >), HybridEos)

std::unique_ptr< EquationOfState< is_relativistic, 2 > > get_clone () const override

bool operator== (const HybridEos< ColdEquationOfState > &rhs) const

bool operator!= (const HybridEos< ColdEquationOfState > &rhs) const

bool is_equal (const EquationOfState< is_relativistic, 2 > &rhs) const override

double rest_mass_density_lower_bound () const override
The lower bound of the rest mass density that is valid for this EOS.

double rest_mass_density_upper_bound () const override
The upper bound of the rest mass density that is valid for this EOS.

double specific_internal_energy_lower_bound (const double rest_mass_density) const override
The lower bound of the specific internal energy that is valid for this EOS at the given rest mass density $$\rho$$.

double specific_internal_energy_upper_bound (const double) const override
The upper bound of the specific internal energy that is valid for this EOS at the given rest mass density $$\rho$$.

double specific_enthalpy_lower_bound () const override
The lower bound of the specific enthalpy that is valid for this EOS.

## Static Public Attributes

static constexpr size_t thermodynamic_dim = 2

static constexpr bool is_relativistic = ColdEquationOfState::is_relativistic

static constexpr Options::String help

## Detailed Description

template<typename ColdEquationOfState>
class EquationsOfState::HybridEos< ColdEquationOfState >

Hybrid equation of state combining a barotropic EOS for cold (zero-temperature) part with a simple thermal part.

The hybrid equation of state:

$p = p_{cold}(\rho) + \rho (\Gamma_{th}-1) (\epsilon - \epsilon_{cold}(\rho))$

where $$p$$ is the pressure, $$\rho$$ is the rest mass density, $$\epsilon$$ is the specific internal energy, $$p_{cold}$$ and $$\epsilon_{cold}$$ are the pressure and specific internal energy evaluated using the cold EOS, and $$\Gamma_{th}$$ is the adiabatic index for the thermal part.

The temperature $$T$$ is defined as

$T = (\Gamma_{th} - 1) (\epsilon - \epsilon_{cold})$

## ◆ help

template<typename ColdEquationOfState >
 constexpr Options::String EquationsOfState::HybridEos< ColdEquationOfState >::help
staticconstexpr
Initial value:
= {
"A hybrid equation of state combining a cold EOS with a simple thermal "
"part. The pressure is related to the rest mass density by "
" p = p_cold(rho) + rho * (Gamma_th - 1) * (epsilon - "
"epsilon_cold(rho)), where p is the pressure, rho is the rest mass "
"density, epsilon is the specific internal energy, p_cold and "
"epsilon_cold are the pressure and specific internal energy evaluated "
"using the cold EOS and Gamma_th is the adiabatic index for the thermal "
"part."}

The documentation for this class was generated from the following file:
• src/PointwiseFunctions/Hydro/EquationsOfState/HybridEos.hpp