DirectionalNeumannBC.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html
 
#include "DirectionalNeumannBC.h"
 
registerMooseObject("MooseApp", DirectionalNeumannBC);
registerMooseObjectRenamed("MooseApp", VectorNeumannBC, "01/01/2025 00:01", DirectionalNeumannBC);
 
InputParameters
DirectionalNeumannBC::validParams()
{
  InputParameters params = IntegratedBC::validParams();
  params.addParam<RealVectorValue>(
      "vector_value", RealVectorValue(), "vector this BC should act in");
  params.addClassDescription("Imposes the integrated boundary condition "
                             "$\\frac{\\partial u}{\\partial n}=\\vec{V}\\cdot\\hat{n}$, "
                             "where $\\vec{V}$ is a user-defined, constant vector.");
  return params;
}
 
DirectionalNeumannBC::DirectionalNeumannBC(const InputParameters & parameters)
  : IntegratedBC(parameters), _value(getParam<RealVectorValue>("vector_value"))
{
}
 
Real
DirectionalNeumannBC::computeQpResidual()
{
  return -_test[_i][_qp] * (_value * _normals[_qp]);
}