INSPressurePoisson 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 <INSPressurePoisson.h>

Inheritance diagram for INSPressurePoisson:

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

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

Protected Attributes
const VariableGradient &	_grad_a1
const VariableGradient &	_grad_a2
const VariableGradient &	_grad_a3
unsigned	_a1_var_number
unsigned	_a2_var_number
unsigned	_a3_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.

Do not use, USE INSChorinPressurePoisson and related classes instead.

Definition at line 27 of file INSPressurePoisson.h.

Constructor & Destructor Documentation

INSPressurePoisson()

INSPressurePoisson::INSPressurePoisson

(

const InputParameters &

parameters

)

Definition at line 35 of file INSPressurePoisson.C.

  : Kernel(parameters),
 
    // Gradients
    _grad_a1(coupledGradient("a1")),
    _grad_a2(_mesh.dimension() >= 2 ? coupledGradient("a2") : _grad_zero),
    _grad_a3(_mesh.dimension() == 3 ? coupledGradient("a3") : _grad_zero),
 
    // Variable numberings
    _a1_var_number(coupled("a1")),
    _a2_var_number(_mesh.dimension() >= 2 ? coupled("a2") : libMesh::invalid_uint),
    _a3_var_number(_mesh.dimension() == 3 ? coupled("a3") : libMesh::invalid_uint),
 
    // Material Properties
    _rho(getMaterialProperty<Real>("rho_name"))
{
}

~INSPressurePoisson()

virtual INSPressurePoisson::~INSPressurePoisson ( )

inlinevirtual

Definition at line 32 of file INSPressurePoisson.h.

{}

Member Function Documentation

computeQpJacobian()

Real INSPressurePoisson::computeQpJacobian ( )

protectedvirtual

Definition at line 68 of file INSPressurePoisson.C.

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

computeQpOffDiagJacobian()

Real INSPressurePoisson::computeQpOffDiagJacobian ( unsigned  jvar )

protectedvirtual

Definition at line 74 of file INSPressurePoisson.C.

{
  if (jvar == _a1_var_number)
    return _rho[_qp] * _grad_phi[_j][_qp](0) * _test[_i][_qp];
 
  else if (jvar == _a2_var_number)
    return _rho[_qp] * _grad_phi[_j][_qp](1) * _test[_i][_qp];
 
  else if (jvar == _a3_var_number)
    return _rho[_qp] * _grad_phi[_j][_qp](2) * _test[_i][_qp];
 
  else
    return 0;
}

computeQpResidual()

Real INSPressurePoisson::computeQpResidual ( )

protectedvirtual

Definition at line 54 of file INSPressurePoisson.C.

{
  // Laplacian part
  Real laplacian_part = _grad_u[_qp] * _grad_test[_i][_qp];
 
  // Divergence part
  Real div_part =
      _rho[_qp] * (_grad_a1[_qp](0) + _grad_a2[_qp](1) + _grad_a3[_qp](2)) * _test[_i][_qp];
 
  // Return the result
  return laplacian_part + div_part;
}

Member Data Documentation

_a1_var_number

unsigned INSPressurePoisson::_a1_var_number

protected

Definition at line 45 of file INSPressurePoisson.h.

Referenced by computeQpOffDiagJacobian().

_a2_var_number

unsigned INSPressurePoisson::_a2_var_number

protected

Definition at line 46 of file INSPressurePoisson.h.

Referenced by computeQpOffDiagJacobian().

_a3_var_number

unsigned INSPressurePoisson::_a3_var_number

protected

Definition at line 47 of file INSPressurePoisson.h.

Referenced by computeQpOffDiagJacobian().

_grad_a1

const VariableGradient& INSPressurePoisson::_grad_a1

protected

Definition at line 40 of file INSPressurePoisson.h.

Referenced by computeQpResidual().

_grad_a2

const VariableGradient& INSPressurePoisson::_grad_a2

protected

Definition at line 41 of file INSPressurePoisson.h.

Referenced by computeQpResidual().

_grad_a3

const VariableGradient& INSPressurePoisson::_grad_a3

protected

Definition at line 42 of file INSPressurePoisson.h.

Referenced by computeQpResidual().

_rho

const MaterialProperty<Real>& INSPressurePoisson::_rho

protected

Definition at line 50 of file INSPressurePoisson.h.

Referenced by computeQpOffDiagJacobian(), and computeQpResidual().

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

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