[Dune] [#442] Periodic boundary conditions in YaspGrid don't work

[Dune]

THIS IS AN AUTOMATED MESSAGE, DO NOT REPLY.

The following task has a new comment added:

FS#442 - Periodic boundary conditions in YaspGrid don't work
User who did this - Oliver Sander (sander)

----------
Hi Christian!
Here's some moral help.  Recently I started playing around with the periodicity feature in YaspGrid and I found out that it does not do at all what I would expect a periodic grid to do.  I would expect a periodic grid to be a topological torus, with no boundary in the periodic directions.  I discussed this with others and was told that periodicity really only works with overlap and the communicate routines.

In my view, this is a bad solution, because it mixes two different concepts, namely parallelism and periodicity.  Either one of those makes sense without the other, but with the current semantics I am forced to use parallelity concepts when I just want a periodic grid on a single processor.  Also, the fact that some nodes are expected to have the same id but different indices violates our grid specification.

If anything of this is to change it will not be before lengthy discussions.  For my own research I have started to write a periodic GridView which implements all the torus topology that I need.  You are right, the sequential YaspGrid doesn't help at all when doing this.  However I am not going to use communication methods for this, because I find these too unwieldy and error-prone for the taks.
----------

More information can be found at the following URL:
http://www.dune-project.org/flyspray/index.php?do=details&task_id=442#comment578

You are receiving this message because you have requested it from the Flyspray bugtracking system.  If you did not expect this message or don't want to receive mails in future, you can change your notification settings at the URL shown above.