[Nek5000-users] The first time step in a Nek file must contain a mesh

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

Can,

With these parameters I'm seeing a vk street at time t=146.0

You may need to change the dynamic range of your plot variable
because the vortices are fairly weak and you otherwise only 
see those that are in the immediate wake of the cylinder.

Please let me know if this resolves the problem.

Best regards,

Paul




> Thank you very much to both of you, these are really useful infos :)
> But i got another question, i can visualize now the vorticity field, but 
> i don't see any v.karman vortexes, i just see some vortexes around my 
> circle (diameter 1) obstacle.
> My bc are as follow : unit-diameter cylinder is centered at (0,0) in a 
> box on [-15,35] x [-15,15]. (picked up the .rea on the ext_cyl example)
> left : velocity inlet with 1m/s
> right : pressure output
> top and bottom , periodic
> Re= 160 (>50 for the instability)
> dt=0.01
> End of simulation Time = 550
> can this be because of the meshe not being tight enough ??
> B.regards
> Can