[Nek5000-users] DIV(V)-QTL too large!

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

You'll get this warning because the error in divergence is larger than 1e-2. 
Typically the error depends strongly on the spatial resolution but also on other things e.g. step size dt, solver tolerances, boundary conditions ... 

In your case it looks like the error decays rapidly in time. I guess this is because of your your initial condition? What error levels do you see after a couple of hundred steps?

-----Original message-----
> From:nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
> Sent: Thursday 21st December 2017 15:00
> To: nek5000-users at lists.mcs.anl.gov
> Subject: [Nek5000-users] DIV(V)-QTL too large!
> 
> Hi all,
> 
> There is always DIV(V)-QTL too large for my flow case until step 42 after which it shows correct. I dont think my mesh needs more resolution (elements number more than 36000)and time step is very short in the first timestep which is DT= 1.0000000E-05. 
> 
> Do you think the results are reliable?
> 
> Kind regards,
> 
> Jian
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