ADWallFrictionChengMaterial

The material computes the friction factor using the Cheng-Todreas correlation.

Equations (9.105a), (9.105b), (9.109a), and (9.109b), and tables (9.5a) and (9.5b) from Todreas and Kazimi (2021) are used.

The Cheng-Todreas correlation gives the friction factor for each subchannel type: interior, edge, or corner. The correlation is a function of the Pitch-to-Diameter ratio, P/DP/D, for interior channels, or the Wall-to-Diameter ratio, W/DW/D, for edge and corner subchannels. Figure 1 shows the three subchannel types for square and hexagonal rod bundles, where PP is the pitch between the fuel rods, WW is the distance between the fuel rod centerline and the bundle wall, and DD is the rod diameter.

Figure 1: Different subchannel types for a square and hexagonal array rod bundles.

The friction factor is given by:

fi=Ci(Rei)n, f_{i} = \frac{C_{i}}{(Re_{i})^n},

where the subscript ii indicates the subchannel type, and the constant nn is equal to 1 for laminar flows and 0.18 for turbulent flows. The Reynolds number is calculated as

Rei=ρvDh,iμ, Re_i = \frac{\rho v D_{h,i}}{\mu},

where the hydraulic diameter will be a function of the flow area and the wetted perimeter for each subchannel type. The friction factor constant CiC_i can be obtained from:

Ci={a+b1(PD1)+b2(PD1)2for interior subchannelsa+b1(WD1)+b2(WD1)2for edge or corner subchannels C_i = \begin{cases} a + b_1\left(\frac{P}{D} - 1\right) + b_2\left(\frac{P}{D} - 1\right)^2 & \text{for interior subchannels}\\ \\ a + b_1\left(\frac{W}{D} - 1\right) + b_2\left(\frac{W}{D} - 1\right)^2 & \text{for edge or corner subchannels}\\ \end{cases}

The values for the constants aa, b1b_1, and b2b_2 are given in tables (9.5a) and (9.5b) from Todreas and Kazimi (2021).

Input Parameters

  • PoDThe Pitch-to-diameter ratio value being assigned into the property

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:The Pitch-to-diameter ratio value being assigned into the property

  • bundle_arrayThe type of the rod bundle array

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:SQUARE, HEXAGONAL

    Controllable:No

    Description:The type of the rod bundle array

  • f_DDarcy friction factor material property

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Darcy friction factor material property

  • subchannel_typeThe type of subchannel to be considered

    C++ Type:MooseEnum

    Unit:(no unit assumed)

    Options:INTERIOR, EDGE, CORNER

    Controllable:No

    Description:The type of subchannel to be considered

Required Parameters

  • D_hD_hHydraulic diameter

    Default:D_h

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Hydraulic diameter

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

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

    Unit:(no unit assumed)

    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>

    Unit:(no unit assumed)

    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

    Unit:(no unit assumed)

    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

    Unit:(no unit assumed)

    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

    Unit:(no unit assumed)

    Controllable:No

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

  • mumuDynamic viscosity of the fluid

    Default:mu

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Dynamic viscosity of the fluid

  • 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.

  • rhorhoDensity of the fluid

    Default:rho

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Density of the fluid

  • 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.

  • velvelFluid velocity

    Default:vel

    C++ Type:MaterialPropertyName

    Unit:(no unit assumed)

    Controllable:No

    Description:Fluid velocity

Optional 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

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Unit:(no unit assumed)

    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

    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.

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>

    Unit:(no unit assumed)

    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>

    Unit:(no unit assumed)

    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. N.E. Todreas and M.S. Kazimi. Nuclear Systems Volume I: Thermal Hydraulic Fundamentals, Third Edition. CRC Press, 2021. ISBN 9781351030489. URL: https://books.google.com/books?id=mwwLEAAAQBAJ.[BibTeX]