[Nek5000-users] linear stability tool

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

Hi

To force base flow to be constant you have to set negative param(31) in 
your ###.rea file. Something like
    -1.00000     p031 NPERT: #perturbation modes
Of course you need the base flow as well. It could be analytical one set 
in useric, or just a field read during initialisation.
Regards
Adam


On 2016-03-15 08:49, nek5000-users at lists.mcs.anl.gov wrote:
> Hi Neks,
>
> I'm trying to use the linear stability tool of Nek5000.
>
> To start with, I am trying to run the ext_cyl example. However, I have 
> found the following problem:
>
> ERROR: arnoldi assumes constant base flow.
>
> I have found on the README tutorial that the base flow has to be 
> specified on the .rea file. I have included a file in the 
> PRESOLVE/RESTART option, however I still have the same error.
>
> What should I modify?
>
> Finally, I have also used a subroutine defined in the .usr file that 
> reads the file containing the base flow. However, the error persist...
>
> Could you help me, please?
>
> Cheers
> SL
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