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 "GrayLambertNeumannBC.h"
      11             : #include "MathUtils.h"
      12             : 
      13             : registerMooseObject("HeatTransferApp", GrayLambertNeumannBC);
      14             : 
      15             : Real GrayLambertNeumannBC::_sigma_stefan_boltzmann = 5.670367e-8;
      16             : 
      17             : InputParameters
      18         203 : GrayLambertNeumannBC::validParams()
      19             : {
      20         203 :   InputParameters params = IntegratedBC::validParams();
      21         406 :   params.addRequiredParam<UserObjectName>("surface_radiation_object_name",
      22             :                                           "Name of the GrayLambertSurfaceRadiationBase UO");
      23         406 :   params.addParam<bool>(
      24             :       "reconstruct_emission",
      25         406 :       true,
      26             :       "Flag to apply constant heat flux on sideset or reconstruct emission by T^4 law.");
      27         203 :   params.addClassDescription("This BC imposes a heat flux density that is computed from the "
      28             :                              "GrayLambertSurfaceRadiationBase userobject.");
      29         203 :   return params;
      30           0 : }
      31             : 
      32         108 : GrayLambertNeumannBC::GrayLambertNeumannBC(const InputParameters & parameters)
      33             :   : IntegratedBC(parameters),
      34         108 :     _glsr_uo(getUserObject<GrayLambertSurfaceRadiationBase>("surface_radiation_object_name")),
      35         324 :     _reconstruct_emission(getParam<bool>("reconstruct_emission"))
      36             : {
      37         108 : }
      38             : 
      39             : Real
      40      876392 : GrayLambertNeumannBC::computeQpResidual()
      41             : {
      42      876392 :   if (!_reconstruct_emission)
      43      243040 :     return _test[_i][_qp] * _glsr_uo.getSurfaceHeatFluxDensity(_current_boundary_id);
      44             : 
      45      633352 :   Real eps = _glsr_uo.getSurfaceEmissivity(_current_boundary_id);
      46      633352 :   Real emission = _sigma_stefan_boltzmann * MathUtils::pow(_u[_qp], 4);
      47      633352 :   return _test[_i][_qp] * eps * (emission - _glsr_uo.getSurfaceIrradiation(_current_boundary_id));
      48             : }
      49             : 
      50             : Real
      51      367360 : GrayLambertNeumannBC::computeQpJacobian()
      52             : {
      53             :   // this is not the exact Jacobian but it ensures correct scaling
      54      367360 :   return _test[_i][_qp] * _sigma_stefan_boltzmann *
      55      367360 :          _glsr_uo.getSurfaceEmissivity(_current_boundary_id) * 4 * MathUtils::pow(_u[_qp], 3) *
      56      367360 :          _phi[_j][_qp];
      57             : }