This section is referenced in the following other sections

- Simulation Setup: Wall

# 7.12.7. 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

## 7.12.7.1. 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 .

  > can be a constant, or a string function of time and global variables.

  > By default, is set to 0 if however a different tolerance can be supplied with .

  > The optional ‘clip’ argument will clip the calculated value of 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 () 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 values are provided as output at every wall. This option computes and stores the entire field along the wall. Since this option computes 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:

  . 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