greyMeanAbsorptionEmission Class Reference

greyMeanAbsorptionEmission radiation absorption and emission coefficients for continuous phase More...

Inheritance diagram for greyMeanAbsorptionEmission:

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Collaboration diagram for greyMeanAbsorptionEmission:

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List of all members.

Public Member Functions
	TypeName ("greyMeanAbsorptionEmission")
	Runtime type information.
	greyMeanAbsorptionEmission (const dictionary &dict, const fvMesh &mesh)
	Construct from components.
virtual	~greyMeanAbsorptionEmission ()
tmp< volScalarField >	aCont (const label bandI=0) const
	Absorption coefficient for continuous phase.
tmp< volScalarField >	eCont (const label bandI=0) const
	Emission coefficient for continuous phase.
tmp< volScalarField >	ECont (const label bandI=0) const
	Emission contribution for continuous phase.
bool	isGrey () const
	Flag for whether the absorption/emission is for a grey gas.
Public Attributes
absorptionCoeffs	coeffs_ [nSpecies_]
Static Public Attributes
static const int	nSpecies_ = 5

---

Detailed Description

greyMeanAbsorptionEmission radiation absorption and emission coefficients for continuous phase

wideBandAbsorptionEmission radiation absorption and emission coefficients for continuous phase.

The coefficients for the species in the Look up table have to be specified for use in moles x P [atm], i.e. (k[i] = species[i]*p*9.869231e-6).

The coefficients for CO and soot or any other added are multiplied by the respective mass fraction being solved

All the species in the dictionary need either to be in the look-up table or being solved. Conversely, all the species solved do not need to be included in the calculation of the absorption coefficient

The names of the species in the absorption dictionary must match exactly the name in the look-up table or the name of the field being solved

The look-up table ("speciesTable") file should be in constant

i.e. dictionary

LookUpTableFileName "speciesTable";

EhrrCoeff 0.0;

CO2 { Tcommon 300.; // Common Temp invTemp true; // Is the polynomial using inverse temperature? Tlow 300.; // Low Temp Thigh 2500.; // High Temp

loTcoeffs // coeffs for T < Tcommon ( 0 // a0 + 0 // a1*T + 0 // a2*T^(+/-)2 + 0 // a3*T^(+/-)3 + 0 // a4*T^(+/-)4 + 0 // a5*T^(+/-)5 + ); hiTcoeffs // coeffs for T > Tcommon ( 18.741 -121.31e3 273.5e6 -194.05e9 56.31e12 -5.8169e15 );

}

Source files

• greyMeanAbsorptionEmission.H
• greyMeanAbsorptionEmission.C

All the bands should have the same number of species and have to be entered in the same order.

There is no check of continuity of the bands. They should not ovelap or have gaps.

The emission constant proportionality is specified per band (EhrrCoeff).

The coefficients for the species in the LookUpTable have to be specified for use in moles x P [atm].i.e. (k[i] = species[i]*p*9.869231e-6).

The coefficients for CO and soot or any other added are multiplied by the respective mass fraction being solved.

The look Up table file should be in the constant directory.

band dictionary:

band0 { bandLimits (1.0e-6 2.63e-6); EhrrCoeff 0.0; species { CH4 { Tcommon 300.; Tlow 300.; Thigh 2500.; invTemp false; loTcoeffs (0 0 0 0 0 0) ; hiTcoeffs (.1 0 0 0 0 0); } CO2 { Tcommon 300.; Tlow 300.; Thigh 2500.; invTemp false; loTcoeffs (0 0 0 0 0 0) ; hiTcoeffs (.1 0 0 0 0 0); }

H2O { Tcommon 300.; Tlow 300.; Thigh 2500.; invTemp false; loTcoeffs (0 0 0 0 0 0) ; hiTcoeffs (.1 0 0 0 0 0); }

Ysoot { Tcommon 300.; Tlow 300.; Thigh 2500.; invTemp false; loTcoeffs (0 0 0 0 0 0) ; hiTcoeffs (.1 0 0 0 0 0); } } }

Source files

• wideBandAbsorptionEmission.H
• wideBandAbsorptionEmission.C

Definition at line 100 of file greyMeanAbsorptionEmission.H.

---

Constructor & Destructor Documentation

greyMeanAbsorptionEmission	(	const dictionary &	dict,
		const fvMesh &	mesh
	)

Construct from components.

Definition at line 42 of file greyMeanAbsorptionEmission.C.

~greyMeanAbsorptionEmission

(

)

[virtual]

Definition at line 135 of file greyMeanAbsorptionEmission.C.

---

Member Function Documentation

TypeName

(

"greyMeanAbsorptionEmission"

)

Runtime type information.

Foam::tmp< Foam::volScalarField > aCont

(

const label

bandI = 0

)

const [virtual]

Absorption coefficient for continuous phase.

Reimplemented from absorptionEmissionModel.

Definition at line 142 of file greyMeanAbsorptionEmission.C.

Foam::tmp< Foam::volScalarField > eCont

(

const label

bandI = 0

)

const [virtual]

Emission coefficient for continuous phase.

Reimplemented from absorptionEmissionModel.

Definition at line 210 of file greyMeanAbsorptionEmission.C.

Foam::tmp< Foam::volScalarField > ECont

(

const label

bandI = 0

)

const [virtual]

Emission contribution for continuous phase.

Reimplemented from absorptionEmissionModel.

Definition at line 234 of file greyMeanAbsorptionEmission.C.

bool isGrey

(

)

const [inline, virtual]

Flag for whether the absorption/emission is for a grey gas.

Reimplemented from absorptionEmissionModel.

Definition at line 185 of file greyMeanAbsorptionEmission.H.

---

Member Data Documentation

const int nSpecies_ = 5 [static]

Definition at line 109 of file greyMeanAbsorptionEmission.H.

absorptionCoeffs coeffs_[nSpecies_]

Definition at line 112 of file greyMeanAbsorptionEmission.H.

---

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

• src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanAbsorptionEmission/greyMeanAbsorptionEmission.H
• src/thermophysicalModels/radiation/submodels/absorptionEmissionModel/greyMeanAbsorptionEmission/greyMeanAbsorptionEmission.C