ElectricalConductivity Class Reference

Calculates resistivity and electrical conductivity as a function of temperature. More...

#include <ElectricalConductivity.h>

Inheritance diagram for ElectricalConductivity:

Public Member Functions
	ElectricalConductivity (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual void	computeQpProperties ()

Private Attributes
const Real	_length_scale
const Real	_ref_resis
const Real	_temp_coeff
const Real	_ref_temp
const VariableValue &	_T
const std::string	_base_name
MaterialProperty< Real > &	_electric_conductivity
MaterialProperty< Real > &	_delectric_conductivity_dT

Detailed Description

Calculates resistivity and electrical conductivity as a function of temperature.

It is assumed that resistivity varies linearly with temperature.

Definition at line 25 of file ElectricalConductivity.h.

Constructor & Destructor Documentation

ElectricalConductivity()

ElectricalConductivity::ElectricalConductivity

(

const InputParameters &

parameters

)

Definition at line 36 of file ElectricalConductivity.C.

  : DerivativeMaterialInterface<Material>(parameters),
    _length_scale(getParam<Real>("length_scale")),
    _ref_resis(getParam<Real>("ref_resistivity")),
    _temp_coeff(getParam<Real>("temp_coeff")),
    _ref_temp(getParam<Real>("ref_temp")),
    _T(coupledValue("temp")),
    _base_name(isParamValid("base_name") ? getParam<std::string>("base_name") + "_" : ""),
    _electric_conductivity(declareProperty<Real>(_base_name + "electrical_conductivity")),
    _delectric_conductivity_dT(declarePropertyDerivative<Real>(
        _base_name + "electrical_conductivity", getVar("temp", 0)->name()))
{
}

Member Function Documentation

computeQpProperties()

void ElectricalConductivity::computeQpProperties ( )

protectedvirtual

Definition at line 51 of file ElectricalConductivity.C.

{
  const Real ref_resis = _ref_resis / _length_scale;
  const Real resistivity = ref_resis * (1.0 + _temp_coeff * (_T[_qp] - _ref_temp));
  const Real dresistivity_dT = ref_resis * _temp_coeff;
  _electric_conductivity[_qp] = 1.0 / resistivity;
  _delectric_conductivity_dT[_qp] = -1.0 / (resistivity * resistivity) * dresistivity_dT;
}

validParams()

InputParameters ElectricalConductivity::validParams ( )

static

Definition at line 18 of file ElectricalConductivity.C.

{
  InputParameters params = Material::validParams();
  params.addCoupledVar("temp", 300.0, "variable for temperature");
  params.addParam<std::string>("base_name", "Material property base name");
  params.addParam<Real>("length_scale", 1.0e-9, "Length scale of model");
  params.addParam<Real>(
      "ref_resistivity",
      6.5e-6,
      "Electrical resistivity of the material at reference temperature in ohm-m.");
  params.addParam<Real>(
      "temp_coeff",
      0.0045,
      "Temperature coefficient for calculating dependence of resistivity on temp.");
  params.addParam<Real>("ref_temp", 300.0, "Reference temperature for Electrical resistivity in K");
  return params;
}

Member Data Documentation

_base_name

const std::string ElectricalConductivity::_base_name

private

Definition at line 42 of file ElectricalConductivity.h.

_delectric_conductivity_dT

MaterialProperty<Real>& ElectricalConductivity::_delectric_conductivity_dT

private

Definition at line 44 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

_electric_conductivity

MaterialProperty<Real>& ElectricalConductivity::_electric_conductivity

private

Definition at line 43 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

_length_scale

const Real ElectricalConductivity::_length_scale

private

Definition at line 36 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

_ref_resis

const Real ElectricalConductivity::_ref_resis

private

Definition at line 37 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

_ref_temp

const Real ElectricalConductivity::_ref_temp

private

Definition at line 39 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

_T

const VariableValue& ElectricalConductivity::_T

private

Definition at line 40 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

_temp_coeff

const Real ElectricalConductivity::_temp_coeff

private

Definition at line 38 of file ElectricalConductivity.h.

Referenced by computeQpProperties().

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The documentation for this class was generated from the following files:

• heat_conduction/include/materials/ElectricalConductivity.h
• heat_conduction/src/materials/ElectricalConductivity.C