- T_wThe wall temperature. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The wall temperature. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- boundaryThe list of boundary IDs from the mesh where this object applies
C++ Type:std::vector<BoundaryName>
Unit:(no unit assumed)
Controllable:No
Description:The list of boundary IDs from the mesh where this object applies
- cpThe specific heat at constant pressure. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The specific heat at constant pressure. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- muDynamic viscosity. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:Dynamic viscosity. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- rhoDensity. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:Density. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- uThe velocity in the x direction. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The velocity in the x direction. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- variableThe name of the variable that this boundary condition applies to
C++ Type:NonlinearVariableName
Unit:(no unit assumed)
Controllable:No
Description:The name of the variable that this boundary condition applies to
INSFVTurbulentTemperatureWallFunction
The function sets up the equivalent heat flux of the near-wall boundary layer when the wall temperature is set by the T_w
parameter.
The boundary conditions are different depending on whether the centroid of the cell near the identified boundary lies in the wall function profile. Taking the non-dimensional wall distance as , the three regions of the boundary layer are identified as follows:
Sub-laminar region:
Buffer region:
Logarithmic region:
For the procedure of determining the non-dimensional wall distance as and the friction velocity please see INSFVTurbulentViscosityWallFunction.
For the sub-laminar and logarithmic layer, the thermal diffusivity is defined as follows:
where:
is the thermal conductivity
is the density
is the specific heat at constant pressure
is the friction velocity defined by law of the wall
is the distance from the boundary to the centroid of the near-wall cell
is the turbulent Prandtl number, which typically ranges between 0.3 and 0.9
is a near-wall scaling factor that is defined as follows:
where:
is the von Kármán constant
is a closure parameter
is the Jayatilleke wall functions defined as follows:
where:
is the Prandtl number
For the buffer layer, i.e., in , the thermal diffusivity is defined via a linear blending function as follows:
Finally, using the thermal diffusivity, the heat flux at the wall is defined as follows:
where:
is the temperature at the centroid of the near-wall cell
is the distance from the wall to the centroid of the near-wall cell
The thermal wall functions are only valid for regions in which the equilibrium momentum wall functions are valid, i.e., no flow detachment, recirculation, etc. For resolving non-equilibrium phenomena, we recommend refining the mesh.
Input Parameters
- C_mu0.09Coupled turbulent kinetic energy closure.
Default:0.09
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Coupled turbulent kinetic energy closure.
- Pr_t0.58The turbulent Prandtl number. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
Default:0.58
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The turbulent Prandtl number. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- displacementsThe displacements
C++ Type:std::vector<VariableName>
Unit:(no unit assumed)
Controllable:No
Description:The displacements
- kappaThe thermal conductivity. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The thermal conductivity. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
- tkeTurbulent kinetic energy functor. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:Turbulent kinetic energy functor. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
- vThe velocity in the y direction. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The velocity in the y direction. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- wThe velocity in the z direction. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
C++ Type:MooseFunctorName
Unit:(no unit assumed)
Controllable:No
Description:The velocity in the z direction. A functor is any of the following: a variable, a functor material property, a function, a post-processor, or a number.
- wall_treatmentneqThe method used for computing the wall functions
Default:neq
C++ Type:MooseEnum
Unit:(no unit assumed)
Controllable:No
Description:The method used for computing the wall functions
Optional Parameters
- absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution
C++ Type:std::vector<TagName>
Unit:(no unit assumed)
Controllable:No
Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution
- extra_matrix_tagsThe extra tags for the matrices this Kernel should fill
C++ Type:std::vector<TagName>
Unit:(no unit assumed)
Controllable:No
Description:The extra tags for the matrices this Kernel should fill
- extra_vector_tagsThe extra tags for the vectors this Kernel should fill
C++ Type:std::vector<TagName>
Unit:(no unit assumed)
Controllable:No
Description:The extra tags for the vectors this Kernel should fill
- matrix_tagssystemThe tag for the matrices this Kernel should fill
Default:system
C++ Type:MultiMooseEnum
Unit:(no unit assumed)
Controllable:No
Description:The tag for the matrices this Kernel should fill
- vector_tagsnontimeThe tag for the vectors this Kernel should fill
Default:nontime
C++ Type:MultiMooseEnum
Unit:(no unit assumed)
Controllable:No
Description:The tag for the vectors this Kernel should fill
Tagging Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Unit:(no unit assumed)
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- implicitTrueDetermines whether this object is calculated using an implicit or explicit form
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Determines whether this object is calculated using an implicit or explicit form
- newton_solveFalseWhether a Newton nonlinear solve is being used
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Whether a Newton nonlinear solve is being used
- use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.