NSThermalBC Class Reference

#include <NSThermalBC.h>

Inheritance diagram for NSThermalBC:

Public Member Functions
	NSThermalBC (const InputParameters &parameters)

Protected Member Functions
virtual Real	computeQpResidual ()

Protected Attributes
unsigned int	_rho_var
const VariableValue &	_rho
Real	_initial
Real	_final
Real	_duration
const IdealGasFluidProperties &	_fp

Detailed Description

Definition at line 21 of file NSThermalBC.h.

Constructor & Destructor Documentation

NSThermalBC()

NSThermalBC::NSThermalBC

(

const InputParameters &

parameters

)

Definition at line 35 of file NSThermalBC.C.

  : NodalBC(parameters),
    _rho_var(coupled(NS::density)),
    _rho(coupledValue(NS::density)),
    _initial(getParam<Real>("initial")),
    _final(getParam<Real>("final")),
    _duration(getParam<Real>("duration")),
    _fp(getUserObject<IdealGasFluidProperties>("fluid_properties"))
{
}

Member Function Documentation

computeQpResidual()

Real NSThermalBC::computeQpResidual ( )

protectedvirtual

Definition at line 47 of file NSThermalBC.C.

{
  Real value;
 
  // For constant temperature, set _initial = _final, or set _duration=0 and set _final.
  //
  // T(t) = T_i + (T_f - T_i) * sin (pi/2 * t/t_d)
  if (_t < _duration)
    value = _initial + (_final - _initial) * std::sin((0.5 * libMesh::pi) * _t / _duration);
  else
    value = _final;
 
  // For the total energy, the essential BC is:
  // rho*E = rho*(c_v*T + |u|^2/2)
  //
  // or, in residual form, (In general, this BC is coupled to the velocity variables.)
  // rho*E - rho*(c_v*T + |u|^2/2) = 0
  //
  // ***at a no-slip wall*** this further reduces to (no coupling to velocity variables):
  // rho*E - rho*cv*T = 0
 
  // std::ios_base::fmtflags flags = Moose::out.flags();
  // Moose::out << std::scientific << std::setprecision(16);
  // Moose::out << "rho*E                        =" << _u[_qp] << std::endl;
  // Moose::out << "(_p[_qp] * _c_v[_qp] * value)=" << (_p[_qp] * _c_v[_qp] * value) << std::endl;
  // //Moose::out << "_c_v[_qp]                    =" << _c_v[_qp] << std::endl;
  // Moose::out.flags(flags);
  return _u[_qp] - (_rho[_qp] * _fp.cv() * value);
}

Member Data Documentation

_duration

Real NSThermalBC::_duration

protected

Definition at line 36 of file NSThermalBC.h.

Referenced by computeQpResidual().

_final

Real NSThermalBC::_final

protected

Definition at line 35 of file NSThermalBC.h.

Referenced by computeQpResidual().

_fp

const IdealGasFluidProperties& NSThermalBC::_fp

protected

Definition at line 39 of file NSThermalBC.h.

Referenced by computeQpResidual().

_initial

Real NSThermalBC::_initial

protected

Definition at line 34 of file NSThermalBC.h.

Referenced by computeQpResidual().

_rho

const VariableValue& NSThermalBC::_rho

protected

Definition at line 32 of file NSThermalBC.h.

Referenced by computeQpResidual().

_rho_var

unsigned int NSThermalBC::_rho_var

protected

Definition at line 31 of file NSThermalBC.h.

---

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

• navier_stokes/include/bcs/NSThermalBC.h
• navier_stokes/src/bcs/NSThermalBC.C