[aspect-devel] Handing nodes problem

[Glerum, A.C. (Anne)]

Hi all,

Not sure if it is related, but this does remind me of the velocity anomalies of the chunk geometry when the manifold was removed in the interior of the domain after AMR (see #1361). But I don’t know how the box geometry interacts with the manifold, if at all. Did you recently update the dev versions of dealii or aspect Lev?

Cheers,
Anne

On 18 May 2017, at 21:40, Lev Karatun <lev.karatun at gmail.com<mailto:lev.karatun at gmail.com>> wrote:

Hi Cedric,

I'm using free slip for the bottom, free surface at the top, prescribed in/outflow for the sides, and periodic boundary for front/back. I attached the screenshots.


Best regards,
Lev Karatun.

2017-05-18 15:04 GMT-04:00 cedric thieulot <c.thieulot at uu.nl<mailto:c.thieulot at uu.nl>>:
Could you please show the viscosity (in log scale), the density and the temperature fields ?
What kind of boundary conditions are you using ?

Cedric.


> On 18 May 2017, at 20:24, Lev Karatun <lev.karatun at gmail.com<mailto:lev.karatun at gmail.com>> wrote:
>
> Hi all,
>
> Lately, several of my simulations crashed with a non-convergence error, and in almost every case there was a velocity anomaly somewhere on the boundary between different refinement levels (see attached screenshot). If I turn off AMR, the problem goes away. I'm using an Iterated Stokes solver, the tolerance is currently 1e-6. I tried lowering the CFL number to 0.1, but it didn't help. I was wondering if anyone had similar problems in the past, and what would be the common approach to deal with them?
>
> Thanks in advance!
>
> Best regards,
> Lev Karatun.
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