INSChorinCorrector Class Reference

This class computes the "Chorin" Corrector equation in fully-discrete (both time and space) form. More...

#include <INSChorinCorrector.h>

Inheritance diagram for INSChorinCorrector:

Public Member Functions
	INSChorinCorrector (const InputParameters &parameters)
virtual	~INSChorinCorrector ()

Protected Member Functions
virtual Real	computeQpResidual ()
virtual Real	computeQpJacobian ()
virtual Real	computeQpOffDiagJacobian (unsigned jvar)

Protected Attributes
const VariableValue &	_u_vel_star
const VariableValue &	_v_vel_star
const VariableValue &	_w_vel_star
const VariableGradient &	_grad_p
unsigned	_u_vel_star_var_number
unsigned	_v_vel_star_var_number
unsigned	_w_vel_star_var_number
unsigned	_p_var_number
unsigned	_component
const MaterialProperty< Real > &	_rho

Detailed Description

This class computes the "Chorin" Corrector equation in fully-discrete (both time and space) form.

Definition at line 24 of file INSChorinCorrector.h.

Constructor & Destructor Documentation

INSChorinCorrector()

INSChorinCorrector::INSChorinCorrector

(

const InputParameters &

parameters

)

Definition at line 40 of file INSChorinCorrector.C.

  : Kernel(parameters),
 
    // Current velocities
    _u_vel_star(coupledValue("u_star")),
    _v_vel_star(_mesh.dimension() >= 2 ? coupledValue("v_star") : _zero),
    _w_vel_star(_mesh.dimension() == 3 ? coupledValue("w_star") : _zero),
 
    // Pressure gradient
    _grad_p(coupledGradient("p")),
 
    // Variable numberings
    _u_vel_star_var_number(coupled("u_star")),
    _v_vel_star_var_number(_mesh.dimension() >= 2 ? coupled("v_star") : libMesh::invalid_uint),
    _w_vel_star_var_number(_mesh.dimension() == 3 ? coupled("w_star") : libMesh::invalid_uint),
    _p_var_number(coupled("p")),
 
    // Required parameters
    _component(getParam<unsigned>("component")),
 
    // Material properties
    _rho(getMaterialProperty<Real>("rho_name"))
{
}

~INSChorinCorrector()

virtual INSChorinCorrector::~INSChorinCorrector ( )

inlinevirtual

Definition at line 29 of file INSChorinCorrector.h.

{}

Member Function Documentation

computeQpJacobian()

Real INSChorinCorrector::computeQpJacobian ( )

protectedvirtual

Definition at line 81 of file INSChorinCorrector.C.

{
  // The on-diagonal Jacobian contribution is just the mass matrix entry.
  return _phi[_j][_qp] * _test[_i][_qp];
}

computeQpOffDiagJacobian()

Real INSChorinCorrector::computeQpOffDiagJacobian ( unsigned  jvar )

protectedvirtual

Definition at line 88 of file INSChorinCorrector.C.

{
  if (((jvar == _u_vel_star_var_number) && (_component == 0)) ||
      ((jvar == _v_vel_star_var_number) && (_component == 1)) ||
      ((jvar == _w_vel_star_var_number) && (_component == 2)))
  {
    // The symmetric term's Jacobian is only non-zero when the
    // component of 'u_star' being differentiated is the same as _component.
    return -_phi[_j][_qp] * _test[_i][_qp];
  }
 
  else if (jvar == _p_var_number)
    return (_dt / _rho[_qp]) * _grad_phi[_j][_qp](_component) * _test[_i][_qp];
 
  else
    return 0;
}

computeQpResidual()

Real INSChorinCorrector::computeQpResidual ( )

protectedvirtual

Definition at line 66 of file INSChorinCorrector.C.

{
  // Vector object for U_star
  RealVectorValue U_star(_u_vel_star[_qp], _v_vel_star[_qp], _w_vel_star[_qp]);
 
  // The symmetric part
  Real symmetric_part = (_u[_qp] - U_star(_component)) * _test[_i][_qp];
 
  // The pressure part, don't forget to multiply by dt!
  Real pressure_part = (_dt / _rho[_qp]) * _grad_p[_qp](_component) * _test[_i][_qp];
 
  return symmetric_part + pressure_part;
}

Member Data Documentation

_component

unsigned INSChorinCorrector::_component

protected

Definition at line 51 of file INSChorinCorrector.h.

Referenced by computeQpOffDiagJacobian(), and computeQpResidual().

_grad_p

const VariableGradient& INSChorinCorrector::_grad_p

protected

Definition at line 42 of file INSChorinCorrector.h.

Referenced by computeQpResidual().

_p_var_number

unsigned INSChorinCorrector::_p_var_number

protected

Definition at line 48 of file INSChorinCorrector.h.

Referenced by computeQpOffDiagJacobian().

_rho

const MaterialProperty<Real>& INSChorinCorrector::_rho

protected

Definition at line 54 of file INSChorinCorrector.h.

Referenced by computeQpOffDiagJacobian(), and computeQpResidual().

_u_vel_star

const VariableValue& INSChorinCorrector::_u_vel_star

protected

Definition at line 37 of file INSChorinCorrector.h.

Referenced by computeQpResidual().

_u_vel_star_var_number

unsigned INSChorinCorrector::_u_vel_star_var_number

protected

Definition at line 45 of file INSChorinCorrector.h.

Referenced by computeQpOffDiagJacobian().

_v_vel_star

const VariableValue& INSChorinCorrector::_v_vel_star

protected

Definition at line 38 of file INSChorinCorrector.h.

Referenced by computeQpResidual().

_v_vel_star_var_number

unsigned INSChorinCorrector::_v_vel_star_var_number

protected

Definition at line 46 of file INSChorinCorrector.h.

Referenced by computeQpOffDiagJacobian().

_w_vel_star

const VariableValue& INSChorinCorrector::_w_vel_star

protected

Definition at line 39 of file INSChorinCorrector.h.

Referenced by computeQpResidual().

_w_vel_star_var_number

unsigned INSChorinCorrector::_w_vel_star_var_number

protected

Definition at line 47 of file INSChorinCorrector.h.

Referenced by computeQpOffDiagJacobian().

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

• navier_stokes/include/kernels/INSChorinCorrector.h
• navier_stokes/src/kernels/INSChorinCorrector.C