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             : #pragma once
      11             : 
      12             : #include "ADKernelValue.h"
      13             : 
      14             : /**
      15             :  * Base class for use when adding Pressure-Stabilized Petrov-Galerkin type stabilization (e.g. a
      16             :  * diagonal) to Lagrange multiplier constraints. This class will add its residual to both the primal
      17             :  * equation and the Lagrange multiplier constraint equation
      18             :  */
      19             : class LMKernel : public ADKernelValue
      20             : {
      21             : public:
      22             :   LMKernel(const InputParameters & parameters);
      23             : 
      24             :   static InputParameters validParams();
      25             : 
      26             : protected:
      27             :   void computeResidual() override;
      28             :   void computeResidualsForJacobian() override;
      29             : 
      30             :   /// The Lagrange multiplier variable
      31             :   MooseVariable & _lm_var;
      32             : 
      33             :   /// The values of the Lagrange multiplier variable at quadrature points
      34             :   const ADVariableValue & _lm;
      35             : 
      36             :   /// The values of the Lagrange multiplier test functions at quadrature points
      37             :   const VariableTestValue & _lm_test;
      38             : 
      39             :   /// The sign (either +1 or -1) applied to this object's residual when adding
      40             :   /// to the Lagrange multiplier constraint equation. The sign should be chosen
      41             :   /// such that the diagonals for the LM block of the matrix are positive
      42             :   const Real _lm_sign;
      43             : 
      44             : private:
      45      150300 :   const std::vector<dof_id_type> & dofIndices() const override { return _all_dof_indices; }
      46             : 
      47             :   /// The union of the primary var dof indices as well as the LM dof indices
      48             :   std::vector<dof_id_type> _all_dof_indices;
      49             : };