[Nek5000-users] Symetric / Antisymetric boundary conditions

[nek5000-users at lists.mcs.anl.gov]

Jean-Christophe,

My only suggestion, without having to get too deep into
code modifications, would be to run the full channel geometry
and explicitly orthogonalize to remove the symmetric modes.

Regarding details of how that would be done, it depends very
much on your particular set up, whether you are running in
parallel vs. serial, etc.

Paul

On Wed, 16 Nov 2011, nek5000-users at lists.mcs.anl.gov wrote:

> Hi Nek's,
>
> I am currently investigation the linear stability of a symetric base flow
> using the linearized perturbation mode. As a matter of fact, I meshed only
> half the domain and used the appropriate symetry boundary conditions. Up to
> now, I was intesrested only in its stability with respect to symetric
> perturbations and thus had no problem. However, I am now interested in its
> stability with respect to antisymetric perturbation and I was wondering if
> there is any relatively simple way to implement such condition?
>
>
> Regards,
>
> -- 
> Jean-Christophe
>