[petsc-users] DG methods in PETSc

[Mark Adams]

Great, and keep it on the list. Lots of people here to help!

On Wed, Feb 11, 2026 at 9:46 AM Matteo Leone <matteo4.leone at mail.polimi.it>
wrote:

> Wow thank you so much! I was almost hopeless, I'll deep dive into it and
> I'll give you a feedback.
>
> Matteo
>
> ------------------------------
> *From:* Mark Adams <mfadams at lbl.gov>
> *Sent:* Wednesday, February 11, 2026 3:38:30 PM
> *To:* Matteo Leone <matteo4.leone at mail.polimi.it>
> *Cc:* petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
> *Subject:* Re: [petsc-users] DG methods in PETSc
>
> DG (discontinuous Galerkin) is done with a "Broken" FE. Yikes I do not see
> a test.
> Here is a test but it is not well verified.
> Mark
>
> On Tue, Feb 10, 2026 at 10:25 AM Matteo Leone via petsc-users <
> petsc-users at mcs.anl.gov> wrote:
>
> Hello, I already posted on Reddit but just to be sure I write even here.
>
> First thanks for the job you do for PETSc, I have used it for several
> projects and is  always nice.
>
> I am writing cause  I am getting mad trying to implement DG solver in
> PETSc, the target is the Euler equations, however I am failing even with
> just the simplest transport equation (u/t + u/x = 0). I was wondering if I
> am missing somenthing. I tried with the DSSetReimannSolver and DualSpaces,
> and more, but I keep failing, I tried also with LLMs, but seems like there
> is no DG code with PETSc on the web, however I see many papers that do it.
>
> I was  wondering if I am maybe missing  something out or what.
>
> For reference I use PETSc 3.24.3 by means of nix.
>
> Thanks in advance, cheers.
>
> Matteo
>
>
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