FinEfficiencyFunctorMaterial

This functor material computes a fin efficiency, which can be used with FinEnhancementFactorFunctorMaterial, for example.

Formulation

Under the following assumptions:

  • straight fin,

  • uniform cross section, and

  • adiabatic tip,

the fin efficiency is the following (Incropera et al., 2002):

where

  • is the heat transfer coefficient,

  • is the thermal conductivity of the fin,

  • is the fin height, i.e., the distance the fin extends above the surface,

  • is the fin perimeter, and

  • is the fin cross-sectional area.

Note that the fin perimeter and cross-sectional area are not needed separately; only the ratio is needed. For example, for a rectangular fin with width and thickness and a cylindrical pin fin with diameter :

Fin type
Rectangular
Cylindrical pin

Usage

This functor material creates a functor material property for the fin efficiency with the name given by the parameter "fin_efficiency_name".

The quantities , , , and are provided by the functor parameters "heat_transfer_coefficient", "thermal_conductivity", "fin_height", and "fin_perimeter_area_ratio", respectively.

Input Parameters

  • fin_heightFin height functor [m]

    C++ Type:MooseFunctorName

    Controllable:No

    Description:Fin height functor [m]

  • fin_perimeter_area_ratioFunctor for the ratio of the fin perimeter to its cross-sectional area [1/m]

    C++ Type:MooseFunctorName

    Controllable:No

    Description:Functor for the ratio of the fin perimeter to its cross-sectional area [1/m]

  • heat_transfer_coefficientHeat transfer coefficient functor [W/(m^2-K)]

    C++ Type:MooseFunctorName

    Controllable:No

    Description:Heat transfer coefficient functor [W/(m^2-K)]

  • thermal_conductivityThermal conductivity functor [W/(m-K)]

    C++ Type:MooseFunctorName

    Controllable:No

    Description:Thermal conductivity functor [W/(m-K)]

Required Parameters

  • blockThe list of blocks (ids or names) that this object will be applied

    C++ Type:std::vector<SubdomainName>

    Controllable:No

    Description:The list of blocks (ids or names) that this object will be applied

  • boundaryThe list of boundaries (ids or names) from the mesh where this object applies

    C++ Type:std::vector<BoundaryName>

    Controllable:No

    Description:The list of boundaries (ids or names) from the mesh where this object applies

  • computeTrueWhen false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.

    Default:True

    C++ Type:bool

    Controllable:No

    Description:When false, MOOSE will not call compute methods on this material. The user must call computeProperties() after retrieving the MaterialBase via MaterialBasePropertyInterface::getMaterialBase(). Non-computed MaterialBases are not sorted for dependencies.

  • constant_onNONEWhen ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

    Default:NONE

    C++ Type:MooseEnum

    Options:NONE, ELEMENT, SUBDOMAIN

    Controllable:No

    Description:When ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

  • declare_suffixAn optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.

    C++ Type:MaterialPropertyName

    Controllable:No

    Description:An optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.

  • fin_efficiency_namefin_efficiencyName to give the fin efficiency functor material property

    Default:fin_efficiency

    C++ Type:MooseFunctorName

    Controllable:No

    Description:Name to give the fin efficiency functor material property

  • 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

    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.

Optional Parameters

  • control_tagsAdds user-defined labels for accessing object parameters via control logic.

    C++ Type:std::vector<std::string>

    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

    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

    Controllable:No

    Description:Determines whether this object is calculated using an implicit or explicit form

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Controllable:No

    Description:The seed for the master random number generator

  • 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

    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.

Advanced Parameters

  • output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)

    C++ Type:std::vector<std::string>

    Controllable:No

    Description:List of material properties, from this material, to output (outputs must also be defined to an output type)

  • outputsnone Vector of output names where you would like to restrict the output of variables(s) associated with this object

    Default:none

    C++ Type:std::vector<OutputName>

    Controllable:No

    Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object

Outputs Parameters

References

  1. Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine, and others. Fundamentals of Heat and Mass Transfer. Wiley New York, sixth edition, 2002.[BibTeX]