Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #include "MomentumFreeBC.h"
      11             : #include "MooseMesh.h"
      12             : #include "NS.h"
      13             : 
      14             : registerMooseObject("NavierStokesApp", MomentumFreeBC);
      15             : 
      16             : InputParameters
      17           0 : MomentumFreeBC::validParams()
      18             : {
      19           0 :   InputParameters params = IntegratedBC::validParams();
      20           0 :   params.addRequiredCoupledVar("vel_x", "x-component of velocity");
      21           0 :   params.addCoupledVar("vel_y", "y-component of velocity");
      22           0 :   params.addCoupledVar("vel_z", "z-component of velocity");
      23           0 :   params.addRequiredParam<unsigned int>("component", "Component of the momentum equation");
      24           0 :   params.addRequiredCoupledVar(NS::pressure, "The value of pressure");
      25           0 :   params.addClassDescription(
      26             :       "Implements free flow boundary conditions for one of the momentum equations.");
      27           0 :   return params;
      28           0 : }
      29             : 
      30           0 : MomentumFreeBC::MomentumFreeBC(const InputParameters & parameters)
      31             :   : IntegratedBC(parameters),
      32           0 :     _component(getParam<unsigned int>("component")),
      33           0 :     _pressure(coupledValue(NS::pressure)),
      34           0 :     _vel_x(coupledValue("vel_x")),
      35           0 :     _vel_y(_mesh.dimension() >= 2 ? coupledValue("vel_y") : _zero),
      36           0 :     _vel_z(_mesh.dimension() >= 3 ? coupledValue("vel_z") : _zero)
      37             : {
      38           0 : }
      39             : 
      40             : Real
      41           0 : MomentumFreeBC::computeQpResidual()
      42             : {
      43           0 :   RealVectorValue vel_vec(_vel_x[_qp], _vel_y[_qp], _vel_z[_qp]);
      44           0 :   return (_u[_qp] * vel_vec * _normals[_qp] + _pressure[_qp] * _normals[_qp](_component)) *
      45           0 :          _test[_i][_qp];
      46             : }