WeakGradientBC.C

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#include "WeakGradientBC.h"

registerMooseObject("MooseApp", WeakGradientBC);

InputParameters
WeakGradientBC::validParams()
{
  InputParameters params = IntegratedBC::validParams();
  params.addClassDescription(
      "Computes a boundary residual contribution consistent with the Diffusion Kernel. "
      "Does not impose a boundary condition; instead computes the boundary "
      "contribution corresponding to the current value of grad(u) and accumulates "
      "it in the residual vector.");
  return params;
}

WeakGradientBC::WeakGradientBC(const InputParameters & parameters) : IntegratedBC(parameters) {}

Real
WeakGradientBC::computeQpResidual()
{
  return (_grad_u[_qp] * _normals[_qp]) * _test[_i][_qp];
}

Real
WeakGradientBC::computeQpJacobian()
{
  return (_grad_phi[_j][_qp] * _normals[_qp]) * _test[_i][_qp];
}