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 "MassLumpedTimeDerivative.h"
      11             : 
      12             : // MOOSE includes
      13             : #include "Assembly.h"
      14             : #include "MooseVariableFE.h"
      15             : 
      16             : #include "libmesh/quadrature.h"
      17             : 
      18             : registerMooseObject("MooseApp", MassLumpedTimeDerivative);
      19             : 
      20             : InputParameters
      21       14542 : MassLumpedTimeDerivative::validParams()
      22             : {
      23       14542 :   InputParameters params = TimeKernel::validParams();
      24       14542 :   params.addClassDescription(
      25             :       "Lumped formulation of the time derivative $\\frac{\\partial u}{\\partial t}$. Its "
      26             :       "corresponding weak form is $\\dot{u_i}(\\psi_i, 1)$ where $\\dot{u_i}$ denotes the time "
      27             :       "derivative of the solution coefficient associated with node $i$.");
      28       14542 :   return params;
      29           0 : }
      30             : 
      31         144 : MassLumpedTimeDerivative::MassLumpedTimeDerivative(const InputParameters & parameters)
      32         144 :   : TimeKernel(parameters), _u_dot_nodal(_var.dofValuesDot())
      33             : {
      34         144 : }
      35             : 
      36             : Real
      37     2133108 : MassLumpedTimeDerivative::computeQpResidual()
      38             : {
      39     2133108 :   return _test[_i][_qp] * _u_dot_nodal[_i];
      40             : }
      41             : 
      42             : Real
      43     2132708 : MassLumpedTimeDerivative::computeQpJacobian()
      44             : {
      45     2132708 :   return _test[_i][_qp] * _du_dot_du[_qp];
      46             : }
      47             : 
      48             : void
      49      140618 : MassLumpedTimeDerivative::computeJacobian()
      50             : {
      51      140618 :   prepareMatrixTag(_assembly, _var.number(), _var.number());
      52      683506 :   for (_i = 0; _i < _test.size(); _i++)
      53     2675596 :     for (_qp = 0; _qp < _qrule->n_points(); _qp++)
      54     2132708 :       _local_ke(_i, _i) += _JxW[_qp] * _coord[_qp] * computeQpJacobian();
      55      140618 :   accumulateTaggedLocalMatrix();
      56      140618 : }