This section is referenced in the following other sections

7.12.4. Mass Flux Boundary Condition On Surface

Scope

Fuego Region

Summary

Defines a boundary condition with a specified mass flux on a named surface of the mesh.

Description

The user can specify a mass flow rate either into or out of the domain. The mass flux should obey the sign convention: positive for flux OUT OF the domain, negative for flux INTO the domain. The specified quantity is the total flow rate through the surface, in units of mass per time (note that this is not mass flow per area). When flow is out of the domain (positive mass flux), no variables other than the mass flux need to be specified. When flow into the domain (negative mass flux), the user must provide all of the variables needed for an inflow boundary condition, including (for turbulent flow) the quantities “turbulence_intensity” and “characteristic_length”. The variables provided by the user are used to compute the state of the incoming fluid (e.g. enthalpy). In addition, by computing the density at the specified state, the velocity at the inlet can be computed (since mass flux is the product of density, velocity and area). This velocity is assumed to be in the direction normal to the inlet surface. Any other velocity specified by the user is ignored.

begin Mass Flux 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

   Characteristic_Length {=} Characteristic length

   Emissivity Spectral File Name {=} Name

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

   Emissivity {=} value

   Enthalpy {=} 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  ]

   Include Condensed Phase Convection

   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...

   Mass Flux {=} Mass_flux

   Mass_Fraction Species {=} Mass fraction

   Mole_Fraction Species {=} Mole fraction

   Porosity Field {=} porosity_field_name

   Porous Condensed Temperature Field {=} porous_condensed_temp_field_name

   Porous Flux Field For {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} [{of} Species] {=} porous_flux_field_name

   Porous Penalty Field For {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} [{of} Species] {=} porous_penalty_field_name

   Porous Target Value Field For {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} [{of} Species] {=} porous_target_field_name

   Porous Volumetric Heat Transfer Coefficient {=} porous_vol_xfer_field_name

   Post Process Delta Area

   Post Process Delta Mass Flow Rate

   Post Process Delta Pressure

   Post Process Delta Thrust

   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...  ]

   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

   Specific Surface Area Field {=} ssa_field_name

   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

   Transparent Band Emissivity {=} value

   Transmissivity {=} value

   Turbulence_Intensity {=} Turbulent intensity

   Use Porous Coupling For {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}

end Mass Flux Boundary Condition On Surface Surfacename

7.12.4.1. 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”

–

Characteristic_Length

Syntax

Characteristic_Length {=} Characteristic length

Summary

Specify characteristic length for possible entrainment on open pressure specified boundary.

Parameter

Value

Default

{=}

{= | are | is}

–

Characteristic length

real

1.0

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

–

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”

–

Enthalpy

Syntax

Enthalpy {=} value

Summary

Value for inflowing enthalpy on mass flux BC.

Description

Value for inflowing enthalpy on mass flux BC. Normally it is best to specify temperature and let Fuego calculate enthalpy, but when coupling mass BCs together it is more natural and less error prone to specify enthalpy directly. The value can be either a constant or a string function of time and global variables.

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

–

Include Condensed Phase Convection

Syntax

Include Condensed Phase Convection

Summary

Include condensed phase convection contribution to enthalpy flux. Requires specifying condensed temperature, porosity, and volumetric heat transfer coefficient fields that are transferred from the porous region.


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…

–

Mass Flux

Syntax

Mass Flux {=} Mass_flux

Summary

Value for the specified mass flux in consistent units. The value can be a constant or a function of time and global variables.

Parameter

Value

Default

{=}

{= | are | is}

–

Mass_flux

“string”

–

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”

–

Porosity Field

Syntax

Porosity Field {=} porosity_field_name

Summary

Specify name of the external field containing the porosity transferred from the porous region.

Parameter

Value

Default

{=}

{= | are | is}

–

porosity_field_name

string

–

Porous Condensed Temperature Field

Syntax

Porous Condensed Temperature Field {=} porous_condensed_temp_field_name

Summary

Specify name of the external field containing the condensed phase temperature transferred from the porous region.

Parameter

Value

Default

{=}

{= | are | is}

–

porous_condensed_temp_field_name

string

–

Porous Flux Field For

Syntax

Porous Flux Field For {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} [{of} Species] {=} porous_flux_field_name

Summary

Specify name of the external field containing the flux transferred from the porous region for the specified equation. For continuity this should be the mass flux (rho*u) field, for enthalpy or species this should be the diffusive flux field.

Parameter

Value

Default

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}

–

Species

string

–

{=}

{= | are | is}

–

porous_flux_field_name

string

–

Porous Penalty Field For

Syntax

Porous Penalty Field For {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} [{of} Species] {=} porous_penalty_field_name

Summary

Specify name of the external field containing the penalty parameter transferred from the porous region for the specified equation.

Parameter

Value

Default

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}

–

Species

string

–

{=}

{= | are | is}

–

porous_penalty_field_name

string

–

Porous Target Value Field For

Syntax

Porous Target Value Field For {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} [{of} Species] {=} porous_target_field_name

Summary

Specify name of the external field containing the target value transferred from the porous region for the specified equation. For continuity this should be pressure, enthalpy it should be enthalpy, and species it should be mass fraction.

Parameter

Value

Default

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}

–

Species

string

–

{=}

{= | are | is}

–

porous_target_field_name

string

–

Porous Volumetric Heat Transfer Coefficient

Syntax

Porous Volumetric Heat Transfer Coefficient {=} porous_vol_xfer_field_name

Summary

Specify name of the external field containing the volumetric heat transfer coefficient transferred from the porous region.

Parameter

Value

Default

{=}

{= | are | is}

–

porous_vol_xfer_field_name

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 Mass Flow Rate

Syntax

Post Process Delta Mass Flow Rate

Summary

Request post processing of delta mass flow rate on this mesh part.

Description

Mass flow rate change can be post-processed on this mesh part for laminar or turbulent flows. This option calculates the absolute value of mass flow rate 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.MaxDeltaMassFlowRate(0).

Note that MaxDeltaMassFlowRate(0) will return the maximum mass flow rate 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 Thrust

Syntax

Post Process Delta Thrust

Summary

Request post processing of delta thrust on this mesh part.

Description

Thrust change can be post-processed on this mesh part for laminar or turbulent flows. This option calculates the absolute value of thrust 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.MaxDeltaThrust(n) where for thrust change in the x-direction n=1, thrust change in the y-direction n=2, and thrust change in the z-direction n=3.

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


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}

–

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

–

Specific Surface Area Field

Syntax

Specific Surface Area Field {=} ssa_field_name

Summary

Specify name of the external field containing the specific surface area transferred from the porous region.

Parameter

Value

Default

{=}

{= | are | is}

–

ssa_field_name

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

–

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”

–

Turbulence_Intensity

Syntax

Turbulence_Intensity {=} Turbulent intensity

Summary

Specify turbulent intensity for use in the calculation for the entrainment value of turbulent kinetic energy when there is possible entrainment on open pressure specified boundary.

Parameter

Value

Default

{=}

{= | are | is}

–

Turbulent intensity

real

–

Use Porous Coupling For

Syntax

Use Porous Coupling For {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}

Summary

Enable porous fluid coupling algorithm for specified equation.

Parameter

Value

Default

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}

–