[Nek5000-users] SFD error message from p66

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

Hi

We had similar problem. Check tolerance fro pressure and velocity solver 
(parameters 21, 22 in .rea). They can limit your convergence.
Regards
Adam

On 06/08/14 06:56, nek5000-users at lists.mcs.anl.gov wrote:
> Hello
>
> I implemented an SFD for a 2d cylinder
>
> https://bitbucket.org/cpraveen/nek5000/src/master/ext_cyl/
>
> It seems to work but the residuals reduce by about 5 orders of 
> magnitude only. Maybe I am not choosing the parameters correctly. I 
> would like to see how others do it and compare with my own implementation.
>
> Best
> praveen
>
>
> On Mon, Jun 30, 2014 at 1:21 PM, <nek5000-users at lists.mcs.anl.gov 
> <mailto:nek5000-users at lists.mcs.anl.gov>> wrote:
>
>     Hi SL
>
>     We have implemented SFD some time ago and we can share the code if
>     you wish. It is probably good to have single tested version of the
>     code than develop number of variations. We've already shared the
>     code with Elia.
>     Regards
>     Adam
>
>
>
>     On 27/06/14 17:28, nek5000-users at lists.mcs.anl.gov
>     <mailto:nek5000-users at lists.mcs.anl.gov> wrote:
>
>         Dear Nek's,
>
>         I'm trying to program a Selective Frequency Damping following
>         the article of Akervik et. al (Physics of Fluids, 2006) and
>         some Nek5000 posts.
>
>         I'm able to compile the code, however, when I try to run my
>         simulation, I find the following error message:
>
>                 0  0.0000E+00 Write checkpoint:
>
>                 0  0.0000E+00 OPEN:
>         At line 335 of file User/nek5_svn/trunk/nek/prepost.f (unit =
>         24, file = '')
>         Fortran runtime error: File '' does not exist
>
>         It seems to be something related to param 66. I've tried with
>         p66=6, 0, 1, -1, but I always get the same error.
>
>         Do you know what happens?
>
>         Thanks
>         SL
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