[Nek5000-users] Periodic bc for bent 2D channel

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

Hello;


I have a question regarding the Periodic BC in Nek5000. I already setup a simulation, it is a 2D channel generated by genbox. Using userdat2 I would be able able to bend it to (0,pi/2) as Half Arch with flow direction from up-left to right-bottom; however when I tried to run it, it seems the periodic bc do not take care of the change in the direction of the flow at the boundary. Now since the left-side periodic domain is in the same position as before, but the right-side one face downward with a 90 deg rotation, I would like to define the Periodic bc as (u_left,v_left)=(-v_right,u_right). Unfortunately after searching a lot in the source code I did not find any relevant information regarding this adjustment or at least re-define the Periodic bc. I really appreciate if you could help me by this.


Many thanks

Azad
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/nek5000-users/attachments/20110607/cc2e0e8c/attachment.html>