FunctorErgunDragCoefficients

Material providing linear and quadratic drag coefficients based on the correlation developed by Ergun.

This class implements the Darcy and Forchheimer coefficients for the Ergun drag force model which is discussed in detail in Computation of friction factors and pre-factors. We also give details on the definition of Darcy and Forchheimer coefficients there.

To summarize, this class implements the Darcy coefficient as

where is the hydraulic diameter defined as where is the diameter of the pebbles in the bed. The Forchheimer coefficient is given as

where we have made the multiplication explicit, instead of writing , to make the 1.75 factor from the Ergun wikipedia page more recognizable.

Input Parameters

  • pebble_diameterPebble diameter

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Pebble diameter

  • porosityPorosity. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.

    C++ Type:MooseFunctorName

    Unit:(no unit assumed)

    Controllable:No

    Description:Porosity. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.

Required Parameters

  • Darcy_multiplier1A multiplier to adjust Darcy coefficients

    Default:1

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:A multiplier to adjust Darcy coefficients

  • Forchheimer_multiplier1A multiplier to adjust Forchheimer coefficients

    Default:1

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:A multiplier to adjust Forchheimer coefficients

  • 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

  • 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.

  • execute_onALWAYSThe list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.

    Default:ALWAYS

    C++ Type:ExecFlagEnum

    Options:XFEM_MARK, NONE, INITIAL, LINEAR, LINEAR_CONVERGENCE, NONLINEAR, NONLINEAR_CONVERGENCE, POSTCHECK, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, MULTIAPP_FIXED_POINT_CONVERGENCE, FINAL, CUSTOM, ALWAYS

    Controllable:No

    Description:The list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.

  • rhorhoDensity. A functor is any of the following: a variable, a functor material property, a function, a postprocessor or a number.

    Default:rho

    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 postprocessor or a number.

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

  • search_methodnearest_node_connected_sidesChoice of search algorithm. All options begin by finding the nearest node in the primary boundary to a query point in the secondary boundary. In the default nearest_node_connected_sides algorithm, primary boundary elements are searched iff that nearest node is one of their nodes. This is fast to determine via a pregenerated node-to-elem map and is robust on conforming meshes. In the optional all_proximate_sides algorithm, primary boundary elements are searched iff they touch that nearest node, even if they are not topologically connected to it. This is more CPU-intensive but is necessary for robustness on any boundary surfaces which has disconnections (such as Flex IGA meshes) or non-conformity (such as hanging nodes in adaptively h-refined meshes).

    Default:nearest_node_connected_sides

    C++ Type:MooseEnum

    Options:nearest_node_connected_sides, all_proximate_sides

    Controllable:No

    Description:Choice of search algorithm. All options begin by finding the nearest node in the primary boundary to a query point in the secondary boundary. In the default nearest_node_connected_sides algorithm, primary boundary elements are searched iff that nearest node is one of their nodes. This is fast to determine via a pregenerated node-to-elem map and is robust on conforming meshes. In the optional all_proximate_sides algorithm, primary boundary elements are searched iff they touch that nearest node, even if they are not topologically connected to it. This is more CPU-intensive but is necessary for robustness on any boundary surfaces which has disconnections (such as Flex IGA meshes) or non-conformity (such as hanging nodes in adaptively h-refined meshes).

  • 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

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