[petsc-users] DMPlex and CGNS

[Jed Brown]

Matthew Knepley <knepley at gmail.com> writes:

> On Mon, Jan 16, 2023 at 6:15 PM Jed Brown <jed at jedbrown.org> wrote:
>
>> How soon do you need this? I understand the grumbling about CGNS, but it's
>> easy to build, uses HDF5 parallel IO in a friendly way, supports high order
>> elements, and is generally pretty expressive. I wrote a parallel writer
>> (with some limitations that I'll remove) and plan to replace the current
>> reader with a parallel reader because I have need to read big CGNS meshes.
>> Alas, my semester is starting so it's hard to make promises, but this is a
>> high priority for my research group and if you share your mesh file, I hope
>> to be able to make the parallel reader work in the next couple weeks.
>>
>
> The biggest hurdle for me is understanding the CGNS format. If you can tell
> me what is going on, I can help write the Plex code that
> interprets it.

I wrote the parallel writer and I'm pretty familiar with the data model. Let's connect in chat.