RadiativeHeatFluxBCBase Class Reference

Boundary condition for radiative heat flux where temperature and the temperature of a body in radiative heat transfer are specified. More...

#include <RadiativeHeatFluxBCBase.h>

Inheritance diagram for RadiativeHeatFluxBCBase:

Public Member Functions
	RadiativeHeatFluxBCBase (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual Real	computeQpResidual ()
virtual Real	computeQpJacobian ()
virtual Real	coefficient () const =0
	qdot = sigma * coeff * (T^4 - Tinf^4 ) sigma: _sigma_stefan_boltzmann coeff: coefficient() coefficientBody: cbody Tinf: temperature of the body irhs More...

Protected Attributes
const Real	_sigma_stefan_boltzmann
	Stefan-Boltzmann constant. More...
const Function &	_tinf
	Function describing the temperature of the body irhs. More...
const Real	_eps_boundary
	Emissivity of the boundary. More...

Detailed Description

Boundary condition for radiative heat flux where temperature and the temperature of a body in radiative heat transfer are specified.

Definition at line 23 of file RadiativeHeatFluxBCBase.h.

Constructor & Destructor Documentation

RadiativeHeatFluxBCBase()

RadiativeHeatFluxBCBase::RadiativeHeatFluxBCBase

(

const InputParameters &

parameters

)

Definition at line 29 of file RadiativeHeatFluxBCBase.C.

  : IntegratedBC(parameters),
    _sigma_stefan_boltzmann(getParam<Real>("stefan_boltzmann_constant")),
    _tinf(getFunction("Tinfinity")),
    _eps_boundary(getParam<Real>("boundary_emissivity"))
{
}

Member Function Documentation

coefficient()

virtual Real RadiativeHeatFluxBCBase::coefficient ( ) const

protectedpure virtual

qdot = sigma * coeff * (T^4 - Tinf^4 ) sigma: _sigma_stefan_boltzmann coeff: coefficient() coefficientBody: cbody Tinf: temperature of the body irhs

Implemented in InfiniteCylinderRadiativeBC.

Referenced by computeQpJacobian(), and computeQpResidual().

computeQpJacobian()

Real RadiativeHeatFluxBCBase::computeQpJacobian ( )

protectedvirtual

Definition at line 46 of file RadiativeHeatFluxBCBase.C.

{
  Real T3 = MathUtils::pow(_u[_qp], 3);
  return 4 * _sigma_stefan_boltzmann * _test[_i][_qp] * coefficient() * T3 * _phi[_j][_qp];
}

computeQpResidual()

Real RadiativeHeatFluxBCBase::computeQpResidual ( )

protectedvirtual

Definition at line 38 of file RadiativeHeatFluxBCBase.C.

{
  Real T4 = MathUtils::pow(_u[_qp], 4);
  Real T4inf = MathUtils::pow(_tinf.value(_t, _q_point[_qp]), 4);
  return _test[_i][_qp] * _sigma_stefan_boltzmann * coefficient() * (T4 - T4inf);
}

validParams()

InputParameters RadiativeHeatFluxBCBase::validParams ( )

static

Definition at line 17 of file RadiativeHeatFluxBCBase.C.

{
  InputParameters params = IntegratedBC::validParams();
  params.addParam<Real>("stefan_boltzmann_constant", 5.670367e-8, "The Stefan-Boltzmann constant.");
  params.addParam<FunctionName>(
      "Tinfinity", "0", "Temperature of the body in radiative heat transfer.");
  params.addParam<Real>("boundary_emissivity", 1, "Emissivity of the boundary.");
  params.addClassDescription("Boundary condition for radiative heat flux where temperature and the"
                             "temperature of a body in radiative heat transfer are specified.");
  return params;
}

Referenced by InfiniteCylinderRadiativeBC::validParams().

Member Data Documentation

_eps_boundary

const Real RadiativeHeatFluxBCBase::_eps_boundary

protected

Emissivity of the boundary.

Definition at line 50 of file RadiativeHeatFluxBCBase.h.

Referenced by InfiniteCylinderRadiativeBC::InfiniteCylinderRadiativeBC().

_sigma_stefan_boltzmann

const Real RadiativeHeatFluxBCBase::_sigma_stefan_boltzmann

protected

Stefan-Boltzmann constant.

Definition at line 44 of file RadiativeHeatFluxBCBase.h.

Referenced by computeQpJacobian(), and computeQpResidual().

_tinf

const Function& RadiativeHeatFluxBCBase::_tinf

protected

Function describing the temperature of the body irhs.

Definition at line 47 of file RadiativeHeatFluxBCBase.h.

Referenced by computeQpResidual().

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

• heat_conduction/include/bcs/RadiativeHeatFluxBCBase.h
• heat_conduction/src/bcs/RadiativeHeatFluxBCBase.C