# Arrhenius Mass Diffusion Material Property

Arbitrary material property of the form A * exp(-Q / RT), where A is the frequency factor, Q is the activation energy, and R is the gas constant.

## Description

ArrheniusMaterialProperty is used to declare an arbitrary material property . Mass diffusion coefficients are defined using an Arrhenius form (Miller et al., 2009) (1) where is a pre-exponential factor, is the activation energy, is the universal gas constant, and is temperature.

## Example Input Syntax

[./D]
type = ArrheniusMaterialProperty
temperature = temp
activation_energy = 0.5
frequency_factor = 5
gas_constant = 8.617e-5
property_name = D
outputs = all
[../]
(test/tests/arrhenius_material_property/test.i)

## Input Parameters

• frequency_factorArrhenius coefficient

C++ Type:double

Description:Arrhenius coefficient

• property_nameSpecify the name of this material property

C++ Type:std::string

Description:Specify the name of this material property

• activation_energyActivation energy

C++ Type:double

Description:Activation energy

• temperatureCoupled temperature

C++ Type:std::vector

Description:Coupled temperature

### Required Parameters

• initial_temperature1Initial temperature

Default:1

C++ Type:double

Description:Initial temperature

• boundaryThe list of boundary IDs from the mesh where this boundary condition applies

C++ Type:std::vector

Description:The list of boundary IDs from the mesh where this boundary condition applies

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

Default:True

C++ Type:bool

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

• gas_constant8.3143Universal gas constant [J/mol-K]

Default:8.3143

C++ Type:double

Description:Universal gas constant [J/mol-K]

• blockThe list of block ids (SubdomainID) that this object will be applied

C++ Type:std::vector

Description:The list of block ids (SubdomainID) that this object will be applied

### Optional Parameters

• enableTrueSet the enabled status of the MooseObject.

Default:True

C++ Type:bool

Description:Set the enabled status of the MooseObject.

• 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

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.

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

C++ Type:std::vector

Description:Adds user-defined labels for accessing object parameters via control logic.

• seed0The seed for the master random number generator

Default:0

C++ Type:unsigned int

Description:The seed for the master random number generator

• implicitTrueDetermines whether this object is calculated using an implicit or explicit form

Default:True

C++ Type:bool

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

• 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 computeSubdomainProperties() 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

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 computeSubdomainProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped

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

C++ Type:std::vector

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

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

Default:none

C++ Type:std::vector

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

## References

1. G. K. Miller, D. A. Petti, J. T. Maki, and D. L. Knudsen. PARFUME theory and model basis report. Technical Report INL/EXT-08-14497, Idaho National Laboratory, 2009.[BibTeX]