Viscosity and thermal conductivity after Lemmon and Jacobsen, Int. More...

#include <cl_GM_HelmholtzTransport_LemmonJacobsen.hpp>

Inheritance diagram for belfem::gasmodels::HelmholtzTransport_LemmonJacobsen:

Collaboration diagram for belfem::gasmodels::HelmholtzTransport_LemmonJacobsen:

Public Member Functions
	HelmholtzTransport_LemmonJacobsen (Gas &aParent, const HelmholtzModel aModel)
	~HelmholtzTransport_LemmonJacobsen ()=default
real	mu (const real T, const real p) const
	dynamic viscosity in Pa*s
real	lambda (const real T, const real p) const
	thermal conductivity in W/(m*K)
Public Member Functions inherited from belfem::gasmodels::HelmholtzTransport
	HelmholtzTransport (Gas &aParent)
virtual	~HelmholtzTransport ()=default

Additional Inherited Members
Protected Attributes inherited from belfem::gasmodels::HelmholtzTransport
Helmholtz &	mEoS

Detailed Description

Viscosity and thermal conductivity after Lemmon and Jacobsen, Int.

J. Thermophys. 25:21-69 (2004), doi 10.1023/B:IJOT.0000022327.04529.f3

One functional form serves nitrogen, argon, oxygen and air; only the coefficient tables differ. This class therefore carries the fluid as a parameter rather than existing once per species, the way EoS_Hydrogen carries its three spin isomers. Nitrogen and oxygen are implemented, being the two fluids BELFEM has a Helmholtz EoS for.

The structure is the same as HelmholtzTransport_Methane – dilute gas plus residual plus a critical enhancement, served from a cache keyed on the last state – but the equations are not Friend's; do not carry expressions across between the two.

eta = eta_0( T ) + eta_r( tau, delta ) Eq. (1) lambda = lambda_0( T ) + lambda_r( tau, delta )

lambda_c( tau, delta ) Eq. (4)

with tau = T_crit / T and delta = rho / rho_crit. There is no critical enhancement on the viscosity: the paper judges it negligible for practical states and fits none.

The paper works in micro Pa s and milli W / ( m K ); the accessors return SI, Pa s and W / ( m K ).

Constructor & Destructor Documentation

◆ HelmholtzTransport_LemmonJacobsen()

belfem::gasmodels::HelmholtzTransport_LemmonJacobsen::HelmholtzTransport_LemmonJacobsen	(	Gas &	aParent,
		const HelmholtzModel	aModel )

Parameters

aParent	gas holding the Helmholtz EoS of this fluid
aModel	HelmholtzModel::Nitrogen or HelmholtzModel::Oxygen

◆ ~HelmholtzTransport_LemmonJacobsen()

belfem::gasmodels::HelmholtzTransport_LemmonJacobsen::~HelmholtzTransport_LemmonJacobsen ( )

default

Member Function Documentation

◆ lambda()

real belfem::gasmodels::HelmholtzTransport_LemmonJacobsen::lambda	(	const real	T,
		const real	p ) const

virtual

thermal conductivity in W/(m*K)

Reimplemented from belfem::gasmodels::HelmholtzTransport.

◆ mu()

real belfem::gasmodels::HelmholtzTransport_LemmonJacobsen::mu	(	const real	T,
		const real	p ) const

virtual

dynamic viscosity in Pa*s