ThermalConductivity Class Reference

This postprocessor computes the thermal conductivity of the bulk. More...

#include <ThermalConductivity.h>

Inheritance diagram for ThermalConductivity:

Public Member Functions
	ThermalConductivity (const InputParameters &parameters)
virtual Real	getValue ()

Static Public Member Functions
static InputParameters	validParams ()

Protected Attributes
const Real	_dx
const PostprocessorValue &	_flux
const PostprocessorValue &	_T_hot
const Real	_length_scale
const Real	_k0

Private Attributes
bool &	_step_zero
	True if this is the zeroth timestep (timestep < 1). More...

Detailed Description

This postprocessor computes the thermal conductivity of the bulk.

Definition at line 23 of file ThermalConductivity.h.

Constructor & Destructor Documentation

ThermalConductivity()

ThermalConductivity::ThermalConductivity

(

const InputParameters &

parameters

)

Definition at line 29 of file ThermalConductivity.C.

  : SideAverageValue(parameters),
    _dx(getParam<Real>("dx")),
    _flux(getPostprocessorValue("flux")),
    _T_hot(getPostprocessorValue("T_hot")),
    _length_scale(getParam<Real>("length_scale")),
    _k0(getParam<Real>("k0")),
    _step_zero(declareRestartableData<bool>("step_zero", true))
{
}

Member Function Documentation

getValue()

Real ThermalConductivity::getValue ( )

virtual

Definition at line 41 of file ThermalConductivity.C.

{
  const Real T_cold = SideAverageValue::getValue();
  Real Th_cond = 0.0;
  if (_t_step >= 1)
    _step_zero = false;
 
  // Calculate effective thermal conductivity in W/(length_scale-K)
  if (std::abs(_T_hot - T_cold) > 1.0e-20)
    Th_cond = std::abs(_flux) * _dx / std::abs(_T_hot - T_cold);
 
  if (_step_zero)
    return _k0;
  else
    return Th_cond / _length_scale; // In W/(m-K)
}

validParams()

InputParameters ThermalConductivity::validParams ( )

static

Definition at line 17 of file ThermalConductivity.C.

{
  InputParameters params = SideAverageValue::validParams();
  params.addRequiredParam<Real>("dx", "Length between sides of sample in length_scale");
  params.addRequiredParam<PostprocessorName>(
      "flux", "Heat flux out of 'cold' boundary in solution units, should always be positive");
  params.addRequiredParam<PostprocessorName>("T_hot", "Temperature on 'hot' boundary in K");
  params.addParam<Real>("length_scale", 1e-8, "Length scale of the solution, default is 1e-8");
  params.addParam<Real>("k0", 0.0, "Initial value of the thermal conductivity");
  return params;
}

Member Data Documentation

_dx

const Real ThermalConductivity::_dx

protected

Definition at line 33 of file ThermalConductivity.h.

Referenced by getValue().

_flux

const PostprocessorValue& ThermalConductivity::_flux

protected

Definition at line 34 of file ThermalConductivity.h.

Referenced by getValue().

_k0

const Real ThermalConductivity::_k0

protected

Definition at line 37 of file ThermalConductivity.h.

Referenced by getValue().

_length_scale

const Real ThermalConductivity::_length_scale

protected

Definition at line 36 of file ThermalConductivity.h.

Referenced by getValue().

_step_zero

bool& ThermalConductivity::_step_zero

private

True if this is the zeroth timestep (timestep < 1).

At the zero timestep, the initial value of thermal conductivity should be returned. This boolean is delcared as a reference so that the variable is restartable data: if we restart, the code will not think it is the zero timestep again.

Definition at line 44 of file ThermalConductivity.h.

Referenced by getValue().

_T_hot

const PostprocessorValue& ThermalConductivity::_T_hot

protected

Definition at line 35 of file ThermalConductivity.h.

Referenced by getValue().

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

• heat_conduction/include/postprocessors/ThermalConductivity.h
• heat_conduction/src/postprocessors/ThermalConductivity.C