NSTemperatureDerivs< T > Class Template Reference

Class outside the Moose hierarchy that contains common functionality for computing derivatives of the temperature variable. More...

#include <NSTemperatureDerivs.h>

Public Member Functions
	NSTemperatureDerivs (T &x)
Real	get_grad (unsigned i)
	The primary interfaces for computing temperature derivatives.
Real	get_hess (unsigned i, unsigned j)

Private Attributes
T &	_data

Detailed Description

template<class T>
class NSTemperatureDerivs< T >

Class outside the Moose hierarchy that contains common functionality for computing derivatives of the temperature variable.

This class is templated so that it can be used by either a Kernel object or a BC object.

Definition at line 24 of file NSTemperatureDerivs.h.

Constructor & Destructor Documentation

NSTemperatureDerivs()

template<class T >

NSTemperatureDerivs< T >::NSTemperatureDerivs

(

T &

x

)

Definition at line 43 of file NSTemperatureDerivs.h.

                                                 : _data(x)
{
}

Member Function Documentation

get_grad()

template<class T >

Real NSTemperatureDerivs< T >::get_grad

(

unsigned

i

)

The primary interfaces for computing temperature derivatives.

Requires access to protected values from the _data reference. The indices input to these functions are in terms of the "canonical" variable numbering.

Definition at line 49 of file NSTemperatureDerivs.h.

{
  // Convenience vars
  const Real U0 = _data._rho[_data._qp];
  const Real U1 = _data._rho_u[_data._qp];
  const Real U2 = _data._rho_v[_data._qp];
  const Real U3 = _data._rho_w[_data._qp];
  const Real U4 = _data._rho_et[_data._qp];
 
  const Real rho2 = U0 * U0;
  const Real mom2 = U1 * U1 + U2 * U2 + U3 * U3;
  const Real tmp = -1.0 / rho2 / _data._fp.cv();
 
  switch (i)
  {
    case 0: // dT/d(rho)
      return (U4 - (mom2 / U0)) * tmp;
 
    case 1: // dT/d(rho*u)
      return U1 * tmp;
 
    case 2: // dT/d(rho*v)
      return U2 * tmp;
 
    case 3: // dT/d(rho*w)
      return U3 * tmp;
 
    case 4: // dT/d(rho*e)
      return -U0 * tmp;
 
    default:
      mooseError("Should not get here!");
      break;
  }
}

Referenced by NSEnergyThermalFlux::computeJacobianHelper_value(), NSEnergyViscousBC::computeQpJacobian(), and NSEnergyViscousBC::computeQpOffDiagJacobian().

get_hess()

template<class T >

Real NSTemperatureDerivs< T >::get_hess	(	unsigned	i,
		unsigned	j
	)

Definition at line 87 of file NSTemperatureDerivs.h.

{
  // Convenience vars
  const Real U0 = _data._rho[_data._qp];
  const Real U1 = _data._rho_u[_data._qp];
  const Real U2 = _data._rho_v[_data._qp];
  const Real U3 = _data._rho_w[_data._qp];
  const Real U4 = _data._rho_et[_data._qp];
 
  const Real rho2 = U0 * U0;
  const Real rho3 = rho2 * U0;
  const Real rho4 = rho3 * U0;
  const Real mom2 = U1 * U1 + U2 * U2 + U3 * U3;
 
  const Real cv = _data._fp.cv();
  const Real tmp = -1.0 / rho2 / cv;
 
  // Only lower-triangle of matrix is defined, it is symmetric
  if (i < j)
    std::swap(i, j);
 
  // Map (i,j) into row-major storage index, 5 entries per row
  unsigned idx = 5 * i + j;
 
  switch (idx)
  {
    // Row 0
    case 0: // rho, rho derivative
      return 2.0 * U4 / rho3 / cv - 3.0 * mom2 / rho4 / cv;
 
    // Row 1
    case 5: // rho*u, rho
      return 2.0 * U1 / rho3 / cv;
 
    case 6: // rho*u, rho*u
      return tmp;
 
    // Row 2
    case 10: // rho*v, rho
      return 2.0 * U2 / rho3 / cv;
 
    case 12: // rho*v, rho*v
      return tmp;
 
    // Row 3
    case 15: // rho*w, rho
      return 2.0 * U3 / rho3 / cv;
 
    case 18: // rho*w, rho*w
      return tmp;
 
    // Row 4
    case 20: // rho*e, rho
      return tmp;
 
    case 11:
    case 16:
    case 17:
    case 21:
    case 22:
    case 23:
    case 24:
      return 0.0;
 
    default:
      mooseError("Should not get here!");
      break;
  }
 
  return 0.0;
}

Referenced by NSEnergyThermalFlux::computeJacobianHelper_value(), NSEnergyViscousBC::computeQpJacobian(), and NSEnergyViscousBC::computeQpOffDiagJacobian().

Member Data Documentation

_data

template<class T >

T& NSTemperatureDerivs< T >::_data

private

Definition at line 39 of file NSTemperatureDerivs.h.

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

• navier_stokes/include/userobjects/NSTemperatureDerivs.h