ElectronTransportCoefficients

Transport coefficients and material properties of electrons and electron mean energy density.

Overview

ElectronTransportCoefficients defines the transport and material properties of electrons and the electron mean energy density. The following are the properties and naming scheme that ElectronTransportCoefficients provides:

  • electron mass, labeled as massem,

  • electron and electron mean energy density charge sign, labeled as sgnem and sgnmean_en,

  • electron and electron mean energy density mobility coefficient, labeled as muem and mumean_en,

  • electron and electron mean energy density diffusion coefficient, labeled as diffem and diffmean_en,

For the electron transport coefficients, they can either be defined as a user-supplied constant or be a function of the mean energy by supplying the output of a Boltzmann solver as a lookup table (such as the outputs from BOLSIG+). The electron mean energy density transport coefficients are defined based on the electron coefficients, such that:

Where:

  • the subscript denotes mean electron energy density properties,

  • the subscript denotes electron properties,

  • is the mobility coefficient, and

  • is the diffusion coefficient.

In addition to the transport and material properties of electrons and the electron mean energy density, ElectronTransportCoefficients also defines the following:

  • the permittivity of free space defined as a diffusion coefficient for the electrostatic potential, labeled as diffpotential,

    • used when defining Poisson's equation as a diffusion equation (i.e., )

  • the background gas temperature, labeled as T_gas, and

  • the background gas pressure, labeled as p_gas.

Example Input File Syntax

[Materials<<<{"href": "../../syntax/Materials/index.html"}>>>]
  [GasBasics]
    type = ElectronTransportCoefficients<<<{"description": "Transport coefficients and material properties of electrons and electron mean energy density.", "href": "ElectronTransportCoefficients.html"}>>>
    interp_trans_coeffs<<<{"description": "Whether to interpolate transport coefficients as a function of the mean energy. If false, coeffs are constant."}>>> = true
    ramp_trans_coeffs<<<{"description": "Whether to ramp the non-linearity of coming from the electron energy dependence of the transport coefficients."}>>> = false
    user_p_gas<<<{"description": "The gas pressure in Pascals."}>>> = 133.322
    em<<<{"description": "Species concentration needed to calculate the poisson source"}>>> = em
    mean_en<<<{"description": "The electron mean energy in log form."}>>> = mean_en
    property_tables_file<<<{"description": "The file containing interpolation tables for material properties."}>>> = Argon_reactions_paper_RateCoefficients/electron_moments.txt
  []
[]
(test/tests/DriftDiffusionAction/2D_RF_Plasma_actions.i)

Input Parameters

  • interp_trans_coeffsFalseWhether to interpolate transport coefficients as a function of the mean energy. If false, coeffs are constant.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether to interpolate transport coefficients as a function of the mean energy. If false, coeffs are constant.

  • potential_unitsThe potential units.

    C++ Type:std::string

    Controllable:No

    Description:The potential units.

  • property_tables_fileThe file containing interpolation tables for material properties.

    C++ Type:FileName

    Controllable:No

    Description:The file containing interpolation tables for material properties.

  • ramp_trans_coeffsFalseWhether to ramp the non-linearity of coming from the electron energy dependence of the transport coefficients.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether to ramp the non-linearity of coming from the electron energy dependence of the transport coefficients.

  • use_molesFalseWhether to use units of moles as opposed to # of molecules.

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Whether to use units of moles as opposed to # of molecules.

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

    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.

  • emSpecies concentration needed to calculate the poisson source

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

    Unit:(no unit assumed)

    Controllable:No

    Description:Species concentration needed to calculate the poisson source

  • ipThe ion density.

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The ion density.

  • mean_enThe electron mean energy in log form.

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The electron mean energy in log form.

  • pressure_dependent_electron_coeffFalseAre the values for the electron mobility and diffusion coefficient dependent on gas pressure

    Default:False

    C++ Type:bool

    Controllable:No

    Description:Are the values for the electron mobility and diffusion coefficient dependent on gas pressure

  • time_units1Units of time

    Default:1

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Units of time

  • user_T_gas300The gas temperature in Kelvin.

    Default:300

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:The gas temperature in Kelvin.

  • user_electron_diffusion_coeff0The electron diffusion coefficient.

    Default:0

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:The electron diffusion coefficient.

  • user_electron_mobility0The electron mobility coefficient.

    Default:0

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:The electron mobility coefficient.

  • user_p_gasThe gas pressure in Pascals.

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

    Unit:(no unit assumed)

    Controllable:No

    Description:The gas pressure in Pascals.

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

  • 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

  • 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.

  • 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

    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.

Material Property Retrieval Parameters

Input Files