A class for defining the time derivative of the heat equation. More...

#include <HeatConductionTimeDerivative.h>

Inheritance diagram for HeatConductionTimeDerivative:

Public Member Functions
	HeatConductionTimeDerivative (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()
	Contructor for Heat Equation time derivative term. More...

Protected Member Functions
virtual Real	computeQpResidual ()
	Compute the residual of the Heat Equation time derivative. More...

virtual Real	computeQpJacobian ()
	Compute the jacobian of the Heat Equation time derivative. More...

Protected Attributes
const MaterialProperty< Real > &	_specific_heat

const MaterialProperty< Real > &	_density

Detailed Description

A class for defining the time derivative of the heat equation.

By default this Kernel computes: \( \rho * c_p * \frac{\partial T}{\partial t}, \) where \( \rho \) and \( c_p \) are material properties with the names "density" and "specific_heat", respectively.

Definition at line 30 of file HeatConductionTimeDerivative.h.

Constructor & Destructor Documentation

◆ HeatConductionTimeDerivative()

HeatConductionTimeDerivative::HeatConductionTimeDerivative ( const InputParameters & parameters )

Definition at line 41 of file HeatConductionTimeDerivative.C.

   : TimeDerivative(parameters),
     _specific_heat(getMaterialProperty<Real>("specific_heat")),
     _density(getMaterialProperty<Real>("density_name"))
 {
 }

Member Function Documentation

◆ computeQpJacobian()

Real HeatConductionTimeDerivative::computeQpJacobian ( )

protectedvirtual

Compute the jacobian of the Heat Equation time derivative.

Definition at line 55 of file HeatConductionTimeDerivative.C.

 {
   return _specific_heat[_qp] * _density[_qp] * TimeDerivative::computeQpJacobian();
 }

◆ computeQpResidual()

Real HeatConductionTimeDerivative::computeQpResidual ( )

protectedvirtual

Compute the residual of the Heat Equation time derivative.

Definition at line 49 of file HeatConductionTimeDerivative.C.

 {
   return _specific_heat[_qp] * _density[_qp] * TimeDerivative::computeQpResidual();
 }

◆ validParams()

InputParameters HeatConductionTimeDerivative::validParams ( )

static

Contructor for Heat Equation time derivative term.

We would like to rename this input parameter to 'density' but gratuitous use of 'density' in the GlobalParams block of many many Bison simulations (for the Density kernel)prevent us from doing this.

Definition at line 17 of file HeatConductionTimeDerivative.C.

 {
   InputParameters params = TimeDerivative::validParams();
   params.addClassDescription(
       "Time derivative term $\\rho c_p \\frac{\\partial T}{\\partial t}$ of "
       "the heat equation for quasi-constant specific heat $c_p$ and the density $\\rho$.");
  
   // Density may be changing with deformation, so we must integrate
   // over current volume by setting the use_displaced_mesh flag.
   params.set<bool>("use_displaced_mesh") = true;
  
   params.addParam<MaterialPropertyName>(
       "specific_heat", "specific_heat", "Property name of the specific heat material property");
  
   params.addParam<MaterialPropertyName>(
       "density_name", "density", "Property name of the density material property");
   return params;
 }