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 "FVScalarLagrangeMultiplierConstraint.h"
      13             : 
      14             : #include "libmesh/enum_point_locator_type.h"
      15             : 
      16             : /**
      17             :  * This Kernel implements the residuals that enforce the constraint
      18             :  *
      19             :  * \phi(element E containing point P) = phi_0
      20             :  *
      21             :  * using a Lagrange multiplier approach. E.g. this kernel enforces the constraint that the
      22             :  * elemental value of \phi, in the element containing P, matches \phi_0
      23             :  *
      24             :  * In particular, this Kernel implements the residual contribution for
      25             :  * the lambda term in Eq. (5), and both terms in Eq. (6) where \int \phi_0 = V_0
      26             :  *
      27             :  * [0]: https://github.com/idaholab/large_media/blob/master/framework/scalar_constraint_kernel.pdf
      28             :  */
      29             : class FVPointValueConstraint : public FVScalarLagrangeMultiplierConstraint
      30             : {
      31             : public:
      32             :   static InputParameters validParams();
      33             : 
      34             :   FVPointValueConstraint(const InputParameters & parameters);
      35           0 :   virtual void meshChanged() override { setMyElem(); }
      36             : 
      37             : private:
      38             :   void setMyElem();
      39             :   ADReal computeQpResidual() override final;
      40             : 
      41             :   /// The point where the constraint should be enforced
      42             :   const Point _point;
      43             : 
      44             :   /// We use a point locator in case the constraint is a point value
      45             :   std::unique_ptr<libMesh::PointLocatorBase> _point_locator;
      46             : 
      47             :   /// Pointer to the element in case we have a point constraint
      48             :   const Elem * _my_elem;
      49             : };