This section is referenced in the following other sections

Simulation Setup: Wall

6.12.7. Wall Boundary Condition On Surface

Scope: Fuego Region
Summary: Defines a wall boundary condition on a named surface of the mesh.

begin Wall Boundary Condition On Surface Surfacename

    {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} Value

   Activate Surface Flux Balance Temperature Algorithm [ With BacksideParamFlux1[ BacksideParamFlux2]  ]

   Backside {dx | h | k | too} {=} BackVal

   Calculate Convection Coefficient Using Tref {=} Tref [Dt_Min {=} DTmin  | {clip}]

   Emissivity Spectral File Name {=} Name

   Enforce Zero Flux For Turbulence Wall Bc

   External Field For VariableName [{of} Species] {=} ExtFieldName [ Of Size Value With Multiplier {=} Multiplier  ]

   Emissivity {=} value

   Function For {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} FuncName [ In The {t | x | y | z} Direction  ]

   Function For Emissivity {=} functionName [ In The {t | x | y | z} Direction  ]

   Function For Mass_Fraction {=} FuncName In The {t | x | y | z} Direction

   Function For Mole_Fraction {=} FuncName In The {t | x | y | z} Direction

   Function For Radiation Boundary Temperature {=} functionName

   Function For Radiation Environment Temperature {=} functionName

   Function For Transmissivity {=} functionName [ In The {t | x | y | z} Direction  ]

   Function For Transparent Band Emissivity {=} functionName [ In The {t | x | y | z} Direction  ]

   Function For Wall Temperature {=} functionName [ In The {t | x | y | z} Direction  ]

   Inline Function For {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} FuncStr

   Integer Data For Subroutine SubName {=} Values...

   Interface Boundary

   Mass_Fraction Species {=} Mass fraction

   Mole_Fraction Species {=} Mole fraction

   Post Process Delta Area

   Post Process Delta Heat Flux

   Post Process Delta Pressure

   Post Process Delta Viscous Stress

   Post Process Yplus

   Postprocess FluxType Flux Of {conserved_enthalpy | continuity | edc_product | enthalpy | mixture_fraction | nuclei | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot | species | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_momentum | x_solid_momentum | y_momentum | y_solid_momentum | z_momentum | z_solid_momentum} [ As aliases...  ]

   Project Nodes

   Progress_Variable ProgressVariableName {=} Value

   Real Data For Subroutine SubName {=} Values...

   Radiation Boundary Temperature {=} value

   Radiation Boundary Temperature Field {=} FieldName

   Radiation Environment Temperature {=} value

   Radiation Environment Temperature Field {=} FieldName

   Subroutine For {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} Subroutine

   Subroutine For Emissivity {=} subroutineName

   Subroutine For Mass_Fraction {=} Subroutine

   Subroutine For Mole_Fraction {=} Subroutine

   Subroutine For Radiation Boundary Temperature {=} subroutineName

   Subroutine For Radiation Environment Temperature {=} subroutineName

   Subroutine For Transmissivity {=} subroutineName

   Subroutine For Transparent Band Emissivity {=} subroutineName

   Subroutine For Wall Temperature {=} subroutineName

   Transparent Band Emissivity {=} value

   Transmissivity {=} value

   Use Equilibrium Production Model

   Use Neumann Condition For Ksgs

   Velocity Is Relative To Mesh

   Wall Temperature {=} value

   Weak Dirichlet

   Law_Of_Wall_Roughness_Parameter {=} Law of the Wall Roughness parameter

   Projected Distance For Exchange Location {=} value

end Wall Boundary Condition On Surface Surfacename

6.12.7.1. Line Commands

Primitivevariable

Syntax

Primitivevariable {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} Value

Summary

Value for the specified variable (in consistent units). Value can be a constant or a string function of position (x,y,z), time (t), and any global variable.

The function string must be enclosed in quotes if it has spaces or commas. For example: x_velocity = “min(1, 0.1*t)”

Parameter	Value	Default
PrimitiveVariable	{contact_angle \| edc_product \| gas_volume_fraction \| mixture_fraction \| pressure \| progress_variable \| scalar_variance \| second_mixture_fraction \| solid_volume_fraction \| soot_mass_fraction \| soot_nuclei_mass_fraction \| temperature \| turbulent_dissipation \| turbulent_frequency \| turbulent_helmholtz_function \| turbulent_kinetic_energy \| turbulent_v2 \| volume_of_fluid \| x_solid_velocity \| x_velocity \| y_solid_velocity \| y_velocity \| z_solid_velocity \| z_velocity}	–
{=}	{= \| are \| is}	–
Value	“string”	–

Activate Surface Flux Balance Temperature Algorithm

Syntax: Activate Surface Flux Balance Temperature Algorithm [ With BacksideParamFlux1[ BacksideParamFlux2] ]
Summary: Compute a surface balance equation for nodal temperature.
Description: To be done

Backside

Syntax: Backside {dx | h | k | too} {=} BackVal
Summary: Specify h, T, k and dx.
Description: To be done

Parameter	Value	Default
BacksideParam	{dx \| h \| k \| too}	–
{=}	{= \| are \| is}	–
BackVal	real	–

Calculate Convection Coefficient

Syntax: Calculate Convection Coefficient Using Tref {=} Tref [Dt_Min {=} DTmin | {clip}]
Summary: Calculates the convection coefficient on the wall using a user-specified value for the reference temperature. This calculates $h = Q / (T_{wall} - T_{ref})$ .

$T_{ref}$ can be a constant, or a string function of time and global variables.

By default, $h$ is set to 0 if $T_{wall} - T_{ref} \lt 1 \times 10^{-6}$ however a different tolerance can be supplied with $\Delta T_{min}$ .

The optional ‘clip’ argument will clip the calculated value of $h$ to be non-negative.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Tref	“string”	–
{=}	{= \| are \| is}	–
DTmin	real	–
Clip	{clip}	–

Emissivity Spectral File Name

Syntax: Emissivity Spectral File Name {=} Name
Summary: Specify the file name for defining spectral radiation properties on a surface.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Name	string	–

Enforce Zero Flux For Turbulence Wall Bc

Syntax: Enforce Zero Flux For Turbulence Wall Bc
Summary: warning{This command is deprecated and has no effect}

External Field For

Syntax: External Field For VariableName [{of} Species] {=} ExtFieldName [ Of Size Value With Multiplier {=} Multiplier ]
Summary: Name of the field that is to be transferred in. For species equation, specify variable as “mass fraction of” followed by the species name for transfers associated with separated individual species field names.

Parameter	Value	Default
VariableName	string	–
Species	string	–
{=}	{= \| are \| is}	–
ExtFieldName	string	–

Emissivity

Syntax: Emissivity {=} value
Summary: Constant value for emissivity variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	“string”	–

Function For

Syntax: Function For {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} FuncName [ In The {t | x | y | z} Direction ]
Summary: Name of function to use for the given variable, in the specified direction.

Parameter	Value	Default
PrimitiveVariable	{contact_angle \| edc_product \| gas_volume_fraction \| mixture_fraction \| pressure \| progress_variable \| scalar_variance \| second_mixture_fraction \| solid_volume_fraction \| soot_mass_fraction \| soot_nuclei_mass_fraction \| temperature \| turbulent_dissipation \| turbulent_frequency \| turbulent_helmholtz_function \| turbulent_kinetic_energy \| turbulent_v2 \| volume_of_fluid \| x_solid_velocity \| x_velocity \| y_solid_velocity \| y_velocity \| z_solid_velocity \| z_velocity}	–
{=}	{= \| are \| is}	–
FuncName	string	–

Function For Emissivity

Syntax: Function For Emissivity {=} functionName [ In The {t | x | y | z} Direction ]
Summary: Name of the function to use for the emissivity in the given direction (default direction = time).

Parameter	Value	Default
{=}	{= \| are \| is}	–
functionName	string	–

Function For Mass_Fraction

Syntax: Function For Mass_Fraction {=} FuncName In The {t | x | y | z} Direction
Summary: Name of the mass fraction function to use for all species in the given direction. Note that this must be a Multicolumn function

Parameter	Value	Default
{=}	{= \| are \| is}	–
FuncName	string	–
Direction	{t \| x \| y \| z}	–

Function For Mole_Fraction

Syntax: Function For Mole_Fraction {=} FuncName In The {t | x | y | z} Direction
Summary: Name of the mass fraction function to use for all species in the given direction. Note that this must be a Multicolumn function

Parameter	Value	Default
{=}	{= \| are \| is}	–
FuncName	string	–
Direction	{t \| x \| y \| z}	–

Function For Radiation Boundary Temperature

Syntax: Function For Radiation Boundary Temperature {=} functionName
Summary: Name of function to use for the radiation_boundary_temperature variable

Parameter	Value	Default
{=}	{= \| are \| is}	–
functionName	string	–

Function For Radiation Environment Temperature

Syntax: Function For Radiation Environment Temperature {=} functionName
Summary: Name of function to use for the radiation_environment_temperature variable

Parameter	Value	Default
{=}	{= \| are \| is}	–
functionName	string	–

Function For Transmissivity

Syntax: Function For Transmissivity {=} functionName [ In The {t | x | y | z} Direction ]
Summary: Name of function to use for the transmissivity variable

Parameter	Value	Default
{=}	{= \| are \| is}	–
functionName	string	–

Function For Transparent Band Emissivity

Syntax: Function For Transparent Band Emissivity {=} functionName [ In The {t | x | y | z} Direction ]
Summary: Name of function to use for the transparent emissivity band for spectral emissivity on surfaces.

Parameter	Value	Default
{=}	{= \| are \| is}	–
functionName	string	–

Function For Wall Temperature

Syntax: Function For Wall Temperature {=} functionName [ In The {t | x | y | z} Direction ]
Summary: Name of function to use for the wall_temperature variable, in the specified direction.

Parameter	Value	Default
{=}	{= \| are \| is}	–
functionName	string	–

Inline Function For

Syntax: Inline Function For {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} FuncStr
Summary: warning{This command is deprecated. Regular BCs now support using string functions directly}

Parameter	Value	Default
PrimitiveVariable	{contact_angle \| edc_product \| gas_volume_fraction \| mixture_fraction \| pressure \| progress_variable \| scalar_variance \| second_mixture_fraction \| solid_volume_fraction \| soot_mass_fraction \| soot_nuclei_mass_fraction \| temperature \| turbulent_dissipation \| turbulent_frequency \| turbulent_helmholtz_function \| turbulent_kinetic_energy \| turbulent_v2 \| volume_of_fluid \| x_solid_velocity \| x_velocity \| y_solid_velocity \| y_velocity \| z_solid_velocity \| z_velocity}	–
{=}	{= \| are \| is}	–
FuncStr	“string”	–

Integer Data For Subroutine

Syntax: Integer Data For Subroutine SubName {=} Values…
Summary: List of integer data values to be passed down in to the user subroutine. These values may be changed by the user subroutine.

Parameter	Value	Default
SubName	string	–
{=}	{= \| are \| is}	–
Values	integer…	–

Interface Boundary

Syntax: Interface Boundary
Summary: Mark this fluids boundary as an interface between two physical regions. Data will be interpolated across this boundary.

Mass_Fraction

Syntax: Mass_Fraction Species {=} Mass fraction
Summary: Value for the mass fraction of selected species. Can be a constant value or a string function of space (x,y,z), time (t), and any global variable.

Parameter	Value	Default
Species	string	–
{=}	{= \| are \| is}	–
Mass fraction	“string”	–

Mole_Fraction

Syntax: Mole_Fraction Species {=} Mole fraction
Summary: Value for the mole fraction of selected species. Can be a constant value or a string function of space (x,y,z), time (t), and any global variable.

Parameter	Value	Default
Species	string	–
{=}	{= \| are \| is}	–
Mole fraction	“string”	–

Post Process Delta Area

Syntax

Post Process Delta Area

Summary

Request post processing of delta area on this mesh part.

Description

Area change can be post-processed on this mesh part for laminar or turbulent flows. This option calculates the absolute value of area change after each iteration of a time step, writes it to the log and stores the last value for a given step. The value can be accessed by solution control and used as a criterion in the evaluator. To access this value use region_name.MaxDeltaArea(n) where for area change in the x-direction n=1, area change in the y-direction n=2, and area change in the z-direction n=3.

Note that MaxDeltaArea(1) will return the maximum area change in x-direction if the request to post process this value was made on more than one boundary in a given region.

Post Process Delta Heat Flux

Syntax

Post Process Delta Heat Flux

Summary

Request post processing of delta heat flux on this mesh part.

Description

Heat flux change can be post-processed on this mesh part for laminar or turbulent flows. This option calculates the absolute value of heat flux change after each iteration of a time step, writes it to the log and stores the last value for a given step. The value can be accessed by solution control and used as a criterion in the evaluator. To access this variable use region_name.MaxDeltaHeatFlux(0)

Note that MaxDeltaHeatFlux(0) will return the maximum heat flux change if the request to post process this value was made on more than one boundary in a given region.

Post Process Delta Pressure

Syntax

Post Process Delta Pressure

Summary

Request post processing of delta pressure on this mesh part.

Description

Pressure change can be post-processed on this mesh part for laminar or turbulent flows. This option calculates the absolute value of pressure change after each iteration of a time step, writes it to the log and stores the last value for a given step. The value can be accessed by solution control and used as a criterion in the evaluator. To access this value use region_name.MaxDeltaPressure(n) where for pressure change in the x-direction n=1, pressure change in the y-direction n=2, and pressure change in the z-direction n=3.

Note that MaxDeltaPressure(1) will return the maximum pressure change in x-direction if the request to post process this value was made on more than one boundary in a given region.

Post Process Delta Viscous Stress

Syntax

Post Process Delta Viscous Stress

Summary

Request post processing of delta viscous stress on this mesh part.

Description

Viscous stress change can be post-processed on this mesh part for laminar or turbulent flows. This option calculates the absolute value of viscous stress change after each iteration of a time step, writes it to the log and stores the last value for a given step. The value can be accessed by solution control and used as a criterion in the evaluator. To access this value use region_name.MaxDeltaViscousStress(n) where for viscous stress change in the x-direction n=1, viscous stress change in the y-direction n=2, and viscous stress change in the z-direction n=3.

Note that MaxDeltaViscousStress(1) will return the maximum viscous stress change in x-direction if the request to post process this value was made on more than one boundary in a given region.

Post Process Yplus

Syntax

Post Process Yplus

Summary

Request post processing of yplus on this mesh part.

Description

The normalized distance to the wall ( $y^+$ ) can be post-processed on any wall (laminar or turbulent). Yplus is calculated in a manner consistent with how it is calculated in the solution procedure. Max/min $y^+$ values are provided as output at every wall. This option computes and stores the entire $y^+$ field along the wall. Since this option computes $y^+$ using the most recent values for all solution variables, the max/min written to the log may differ from the max/min of this field. However, these will become identical at convergence.

Note that this line command does not automatically output this field to a results file. For that, one must use the standard output line command for a nodal field using the string name, yplus.

Postprocess

Syntax

Postprocess FluxType Flux Of {conserved_enthalpy | continuity | edc_product | enthalpy | mixture_fraction | nuclei | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot | species | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_momentum | x_solid_momentum | y_momentum | y_solid_momentum | z_momentum | z_solid_momentum} [ As aliases… ]

Summary

Enable nodal flux post-processing for a given equation. Flux types can be “total”, “advective”, or “diffusive”. Integrated fluxes will also be output to global variables for post-processing or use in other string functions.

By default the variables will be named based on the equation and sideset they are applied to as bc_FluxType_EquationName_flux_SurfaceName. However, if you want to assign a more compact or descriptive name you can provide it with

POSTPROCESS TOTAL FLUX OF Continuity AS mdot1

When post-processing enthalpy, the average temperature is also output as a global variable. If you provide only one alias the enthalpy flux uses your alias and the average temperature is automatically named. If you provide two aliases the first is used for enthalpy and the second is used for temperature.

POSTPROCESS TOTAL FLUX OF ENTHALPY AS hFlux
POSTPROCESS TOTAL FLUX OF ENTHALPY AS hFlux Tavg

When post-processing species, the post-processor is run for each species that is solved for. This means that there is no post-processor run on the last species (which is determined by a fractional balance). If you provide aliases for the species post-processor you should provide one for each post-processed species. For example, in a problem with O2, CO2, and N2 (in that order) you could use:

POSTPROCESS TOTAL FLUX OF SPECIES AS mdotO2 mdotCO2

Parameter	Value	Default
FluxType	string	–
equation	{conserved_enthalpy \| continuity \| edc_product \| enthalpy \| mixture_fraction \| nuclei \| progress_variable \| scalar_variance \| second_mixture_fraction \| solid_volume_fraction \| soot \| species \| temperature \| turbulent_dissipation \| turbulent_frequency \| turbulent_helmholtz_function \| turbulent_kinetic_energy \| turbulent_v2 \| volume_of_fluid \| x_momentum \| x_solid_momentum \| y_momentum \| y_solid_momentum \| z_momentum \| z_solid_momentum}	–

Project Nodes

Syntax: Project Nodes
Summary: Allow for nodal projection on the particular mesh part.
Description: The nodal projection of velocity is defaulted to occur on open boundary conditions only. Wall and inflow BCs are defaulted to not be projected, even on flux inflow (i.e., USE FLUXES) and turbulent wall nodes. This option flags the particular mesh part to be included in the nodes to be projected.

Progress_Variable

Syntax: Progress_Variable ProgressVariableName {=} Value
Summary: Constant value for the progress variable of selected scalars.

Parameter	Value	Default
ProgressVariableName	string	–
{=}	{= \| are \| is}	–
Value	real	–

Real Data For Subroutine

Syntax: Real Data For Subroutine SubName {=} Values…
Summary: List of real data values to be passed down in to the user subroutine. These values may be changed by the user subroutine.

Parameter	Value	Default
SubName	string	–
{=}	{= \| are \| is}	–
Values	real…	–

Radiation Boundary Temperature

Syntax: Radiation Boundary Temperature {=} value
Summary: Constant value for radiation_boundary_temperature variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	“string”	–

Radiation Boundary Temperature Field

Syntax: Radiation Boundary Temperature Field {=} FieldName
Summary: Name of the field to use for the radiation boundary temperature.

Parameter	Value	Default
{=}	{= \| are \| is}	–
FieldName	string	–

Radiation Environment Temperature

Syntax: Radiation Environment Temperature {=} value
Summary: Constant value for radiation_environment_temperature variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	“string”	–

Radiation Environment Temperature Field

Syntax: Radiation Environment Temperature Field {=} FieldName
Summary: Name of the field to use for the radiation environment temperature.

Parameter	Value	Default
{=}	{= \| are \| is}	–
FieldName	string	–

Subroutine For

Syntax: Subroutine For {contact_angle | edc_product | gas_volume_fraction | mixture_fraction | pressure | progress_variable | scalar_variance | second_mixture_fraction | solid_volume_fraction | soot_mass_fraction | soot_nuclei_mass_fraction | temperature | turbulent_dissipation | turbulent_frequency | turbulent_helmholtz_function | turbulent_kinetic_energy | turbulent_v2 | volume_of_fluid | x_solid_velocity | x_velocity | y_solid_velocity | y_velocity | z_solid_velocity | z_velocity} {=} Subroutine
Summary: Name of the subroutine to use for this variable.

Parameter	Value	Default
PrimitiveVariable	{contact_angle \| edc_product \| gas_volume_fraction \| mixture_fraction \| pressure \| progress_variable \| scalar_variance \| second_mixture_fraction \| solid_volume_fraction \| soot_mass_fraction \| soot_nuclei_mass_fraction \| temperature \| turbulent_dissipation \| turbulent_frequency \| turbulent_helmholtz_function \| turbulent_kinetic_energy \| turbulent_v2 \| volume_of_fluid \| x_solid_velocity \| x_velocity \| y_solid_velocity \| y_velocity \| z_solid_velocity \| z_velocity}	–
{=}	{= \| are \| is}	–
Subroutine	string	–

Subroutine For Emissivity

Syntax: Subroutine For Emissivity {=} subroutineName
Summary: Name of the user subroutine to use for the emissivity variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
subroutineName	string	–

Subroutine For Mass_Fraction

Syntax: Subroutine For Mass_Fraction {=} Subroutine
Summary: Name of the subroutine to use for the mass fraction. ALL species mass fractions must be assigned by this subroutine.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Subroutine	string	–

Subroutine For Mole_Fraction

Syntax: Subroutine For Mole_Fraction {=} Subroutine
Summary: Name of the subroutine to use for the mole fractions. ALL species mole fractions must be assigned by this subroutine.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Subroutine	string	–

Subroutine For Radiation Boundary Temperature

Syntax: Subroutine For Radiation Boundary Temperature {=} subroutineName
Summary: Name of the user subroutine to use for the radiation_boundary_temperature variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
subroutineName	string	–

Subroutine For Radiation Environment Temperature

Syntax: Subroutine For Radiation Environment Temperature {=} subroutineName
Summary: Name of the user subroutine to use for the radiation_environment_temperature variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
subroutineName	string	–

Subroutine For Transmissivity

Syntax: Subroutine For Transmissivity {=} subroutineName
Summary: Name of the user subroutine to use for the transmissivity variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
subroutineName	string	–

Subroutine For Transparent Band Emissivity

Syntax: Subroutine For Transparent Band Emissivity {=} subroutineName
Summary: Name of the user subroutine to use for the transparent emissivity band for spectral emissivity on surfaces.

Parameter	Value	Default
{=}	{= \| are \| is}	–
subroutineName	string	–

Subroutine For Wall Temperature

Syntax: Subroutine For Wall Temperature {=} subroutineName
Summary: Name of the user subroutine to use for the wall_temperature variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
subroutineName	string	–

Transparent Band Emissivity

Syntax: Transparent Band Emissivity {=} value
Summary: Constant value to use for the emissivity in the transparent band for spectral surfaces.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	“string”	–

Transmissivity

Syntax: Transmissivity {=} value
Summary: Constant value for transmissivity variable.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	“string”	–

Use Equilibrium Production Model

Syntax

Use Equilibrium Production Model

Summary

Change near-wall turbulence production.

Description

This option specifies that the near wall turb_ke production term is given by:

$\frac{{\tau_w}^2}{\kappa \sqrt[4]{C_\mu}\rho y_p \sqrt{k}}$

. Modifications are made for the KW and SST model. This model is suggested when using the standard KW and SST model when a Dirichlet condition is not placed on the wall node of turbulence kinetic energy.

Use Neumann Condition For Ksgs

Syntax: Use Neumann Condition For Ksgs
Summary: Apply a Neumann bc for the one-equation turbulent SGS equation.
Description: This option specifies that the normal component of the subgrid scale gradient is zero at the wall. The standard SGS production and dissipation term are used. This method is preferred over the USE EQUILIBRIUM PRODUCTION MODEL option that is most suitable for RANS. Moreover, the user should remove the OMIT NEAR WALL TURBULENT KE TRANSPORT EQUATION option from solution options and ensure that DETERMINE UTAU VIA NONLINEAR LAW OF THE WALL ITERATION has been activated.

Velocity Is Relative To Mesh

Syntax: Velocity Is Relative To Mesh
Summary: Indicates that the specified velocity is relative to the mesh motion. Applicable only for wall BCs.

Wall Temperature

Syntax: Wall Temperature {=} value
Summary: Value for wall_temperature variable. Can be a constant or a string function of space (x,y,z), time (t) or global variables.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	“string”	–

Weak Dirichlet

Syntax: Weak Dirichlet
Summary: Use weak implementation for dirichlet condition

Law_Of_Wall_Roughness_Parameter

Syntax: Law_Of_Wall_Roughness_Parameter {=} Law of the Wall Roughness parameter
Summary: Specify dimensionless roughness factor to be used in the law-of-the-wall formulation.

Parameter	Value	Default
{=}	{= \| are \| is}	–
Law of the Wall Roughness parameter	real	9.8

Projected Distance For Exchange Location

Syntax: Projected Distance For Exchange Location {=} value
Summary: Specify projected distance for the exchange-based model; generally roughly three elements.

Parameter	Value	Default
{=}	{= \| are \| is}	–
value	real	0.0