[Nek5000-users] perturbation mode question

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

Hi Neks,

I'm trying to solve the linearized Navier Stokes equations. Following 
different posts, I've seen that it maight be possible if I activate the 
perturbation mode.

What I'm doing is the following:

1) I set param 31 to

      -1.00000     p031 NPERT: #perturbation modes

2) I have introduced the base flow in the presolve/restart options in 
the following way:

                 1  PRESOLVE/RESTART OPTIONS  *****
             BASE0.f00011

Should it be enough to solve this problem?
I don't know how to introduce the perturbation in the equations and how 
to set in Nek5000 the file BASE0.f00011 as base flow.

Thanks
SL