FVScalarLagrangeMultiplierConstraint

This object is a base class for implementing variable value constraints using Lagrange multipliers.

The detailed description of the derivation for the corresponding finite element constraint can be found at scalar_constraint_kernel. The finite volume version can be obtained by simply substituting $var element = document.getElementById("moose-equation-474beb79-5de8-420a-8896-321c012ddf0b");katex.render("1", element, {displayMode:false,throwOnError:false});$ for $var element = document.getElementById("moose-equation-86b52569-7a4b-473f-bf66-3d757ff5c437");katex.render("\\varphi", element, {displayMode:false,throwOnError:false});$ .

warning

The contribution to the diagonal of the system of this kernel is null, which introduces a saddle point. Make sure to use a NONZERO shift in your preconditioner.