[aspect-devel] Handing nodes problem

[Lev Karatun]

Hi Anne,

yes, I updated Aspect 4 days ago, and DealII about 2 weeks ago.

John, strainrate-based refinement is what also came to my mind when I first
faced the problem, and I tried it about a month ago. It also didn't
converge, but I don't remember why, and failing to figure it out from
looking at the vtu's. I guess I'll just try it again.

Best regards,
Lev Karatun.

2017-05-19 7:42 GMT-04:00 Glerum, A.C. (Anne) <A.C.Glerum at uu.nl>:

> 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> 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>:
>
>> 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> 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.
>> > <mantle_vel_anomaly.png>_______________________________________________
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>>
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>
> <hanging_node_density.png><hanging_node_T.png><hanging_node_visc.png>
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