Re: [Libmesh-users] Are there QBC, non-homogeneous BC, essential BC by modifying equations?

[edgar <edg...@cr...>]

On 2021-05-05 20:02, John Peterson wrote:
> Hi Edgar,
> 
> Sorry for not responding, your email got kind of lost in my inbox.

Not at all. Thank you very much. I can only imagine how busy you are :) 
.

> 
> LibMesh does support penalty BCs, some examples which use penalty BCs
> are: adjoints_ex1,2,4; adaptivity_ex1,2,4. It sounds like you may be
> interested in DirichletBoundary objects, which impose the BCs as
> user-defined constraints. Examples using DirichletBoundary objects are:
> adaptivity_ex3; adjoints_ex5,6,7; fem_system_ex1,3,4. The 
> implementation of
> DirichletBoundary objects corresponds to the description you gave in 
> your
> original email about modifying the matrix and rhs.
> 

This is super useful. Thanks!