[Nek5000-users] Nek5000 pertubation mode

[Paul Fischer]

Dear Antonio,

Thanks for bringing this to my attention.  I had similarly
found this as the issue last week and had started to investigate
when I got derailed by other projects.  I'll try to sort this
out and hopefully repair the svn repo version of the code today.

Best regards,

Paul



On Wed, 3 Jun 2009, Antonios Monokrousos wrote:

> Dear Paul,
> I finally found what the problem with my case was. It was the
> de-aliasing. The problem appears first in the subroutine advabp (file
> perturb.f) where subroutine convop is called (file navier1.f). It seems
> that de-aliasing is not working for the pertubation/linear mode (?) When
> I deactivate the de-aliasing (from the rea file) the result looks correct.
> I tested it also with channel flow and it was the same problem: In
> pertubation mode, with de-aliasing a forcing appears in a few specific
> elements. I haven't been able to understand exactly why this happens but
> I suspect it has to do with the size of the arrays.
> Best regards
> Antonios
>
>
> -- 
> ---------------------------------------------------------------------------------------------
> Antonios Monokrousos
> Department of Mechanics                 email:    antonios at mech.kth.se
> Royal Institute of Technology (KTH)     phone:    +46 8 790 68 76
> Osquars Backe 18                        telefax:  +46 8 796 98 50
> SE-100 44 Stockholm, SWEDEN
>