INSChorinPressurePoisson Class Reference

This class computes the pressure Poisson solve which is part of the "split" scheme used for solving the incompressible Navier-Stokes equations. More...

#include <INSChorinPressurePoisson.h>

Inheritance diagram for INSChorinPressurePoisson:

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

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

Protected Attributes
const VariableGradient &	_grad_u_star
const VariableGradient &	_grad_v_star
const VariableGradient &	_grad_w_star
unsigned	_u_vel_star_var_number
unsigned	_v_vel_star_var_number
unsigned	_w_vel_star_var_number
const MaterialProperty< Real > &	_rho

Detailed Description

This class computes the pressure Poisson solve which is part of the "split" scheme used for solving the incompressible Navier-Stokes equations.

Definition at line 25 of file INSChorinPressurePoisson.h.

Constructor & Destructor Documentation

INSChorinPressurePoisson()

INSChorinPressurePoisson::INSChorinPressurePoisson

(

const InputParameters &

parameters

)

Definition at line 35 of file INSChorinPressurePoisson.C.

  : Kernel(parameters),
 
    // Gradients
    _grad_u_star(coupledGradient("u_star")),
    _grad_v_star(_mesh.dimension() >= 2 ? coupledGradient("v_star") : _grad_zero),
    _grad_w_star(_mesh.dimension() == 3 ? coupledGradient("w_star") : _grad_zero),
 
    // 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),
 
    // Material properties
    _rho(getMaterialProperty<Real>("rho_name"))
{
}

~INSChorinPressurePoisson()

virtual INSChorinPressurePoisson::~INSChorinPressurePoisson ( )

inlinevirtual

Definition at line 30 of file INSChorinPressurePoisson.h.

{}

Member Function Documentation

computeQpJacobian()

Real INSChorinPressurePoisson::computeQpJacobian ( )

protectedvirtual

Definition at line 69 of file INSChorinPressurePoisson.C.

{
  return _grad_phi[_j][_qp] * _grad_test[_i][_qp];
}

computeQpOffDiagJacobian()

Real INSChorinPressurePoisson::computeQpOffDiagJacobian ( unsigned  jvar )

protectedvirtual

Definition at line 75 of file INSChorinPressurePoisson.C.

{
  if (jvar == _u_vel_star_var_number)
    return (_rho[_qp] / _dt) * _grad_phi[_j][_qp](0) * _test[_i][_qp];
 
  else if (jvar == _v_vel_star_var_number)
    return (_rho[_qp] / _dt) * _grad_phi[_j][_qp](1) * _test[_i][_qp];
 
  else if (jvar == _w_vel_star_var_number)
    return (_rho[_qp] / _dt) * _grad_phi[_j][_qp](2) * _test[_i][_qp];
 
  else
    return 0;
}

computeQpResidual()

Real INSChorinPressurePoisson::computeQpResidual ( )

protectedvirtual

Definition at line 54 of file INSChorinPressurePoisson.C.

{
  // Laplacian part
  Real laplacian_part = _grad_u[_qp] * _grad_test[_i][_qp];
 
  // Divergence part, don't forget to *divide* by _dt
  Real div_part = (_rho[_qp] / _dt) *
                  (_grad_u_star[_qp](0) + _grad_v_star[_qp](1) + _grad_w_star[_qp](2)) *
                  _test[_i][_qp];
 
  // Return the result
  return laplacian_part + div_part;
}

Member Data Documentation

_grad_u_star

const VariableGradient& INSChorinPressurePoisson::_grad_u_star

protected

Definition at line 38 of file INSChorinPressurePoisson.h.

Referenced by computeQpResidual().

_grad_v_star

const VariableGradient& INSChorinPressurePoisson::_grad_v_star

protected

Definition at line 39 of file INSChorinPressurePoisson.h.

Referenced by computeQpResidual().

_grad_w_star

const VariableGradient& INSChorinPressurePoisson::_grad_w_star

protected

Definition at line 40 of file INSChorinPressurePoisson.h.

Referenced by computeQpResidual().

_rho

const MaterialProperty<Real>& INSChorinPressurePoisson::_rho

protected

Definition at line 48 of file INSChorinPressurePoisson.h.

Referenced by computeQpOffDiagJacobian(), and computeQpResidual().

_u_vel_star_var_number

unsigned INSChorinPressurePoisson::_u_vel_star_var_number

protected

Definition at line 43 of file INSChorinPressurePoisson.h.

Referenced by computeQpOffDiagJacobian().

_v_vel_star_var_number

unsigned INSChorinPressurePoisson::_v_vel_star_var_number

protected

Definition at line 44 of file INSChorinPressurePoisson.h.

Referenced by computeQpOffDiagJacobian().

_w_vel_star_var_number

unsigned INSChorinPressurePoisson::_w_vel_star_var_number

protected

Definition at line 45 of file INSChorinPressurePoisson.h.

Referenced by computeQpOffDiagJacobian().

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

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