Re: [Libmesh-users] L2 Projection in example sys_of_eqn_ex6

[David K. <dav...@ak...>]

We use a discontinuous basis, L2_LAGRANGE, so you can do an element-local
projection with no problem. The dofs are duplicated.

David


On Thu, Oct 12, 2017 at 12:35 PM, Renato Poli <re...@gm...> wrote:

> Hi,
>
> I believe this is a simple conceptual doubt on FEM and stress recovery -
> perhaps you can help me with some reference literature or brief clue...
>
> Concerning example system_of_equations_ex6.
>
> In funcion "compute_stress", it calculates a L2 projection of the stresses,
> element by element, right?
>
> My doubt is related to setting the degree of freedom values in:
> >> stress_system.solution->set(dof_index, projected_data(index));
>
> Won't multiple elements set  the same dof? Will it be set multiple times?
> Did I miss something?
>
> Thanks,
> Renato
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