[aspect-devel] Composition refinement strategy

[Lev Karatun]

Hi John,

then I don't understand what the difference between "composition" and
"composition gradient" strategies is. Can you clarify it please?

Best regards,
Lev Karatun.

2017-05-17 14:40 GMT-04:00 John Naliboff <jbnaliboff at ucdavis.edu>:

> Hi Lev,
>
> The AMR should indeed be refining according to the compositional
> gradients. If you want to refine in regions without compositional gradients
> or another property (e.g. viscosity, velocity, etc), you can use the
> “minimum refinement function” option to initially refine based on position.
>
> Cheers,
> John
>
> *************************************************
> John Naliboff
> Assistant Project Scientist, CIG
> Earth & Planetary Sciences Dept., UC Davis
>
>
>
>
>
>
> On May 17, 2017, at 12:20 PM, Lev Karatun <lev.karatun at gmail.com> wrote:
>
> Hi,
>
> I was using the composition refinement strategy for my models, and it's
> not working I expected it to. I have 5 c.f. in my model - upper and lower
> crust, weak zone, lithospheric and sub-lithospheric mantle. Lithoispheric
> mantle is shown on screenshot "composition_setup" (attached). The
> refinement scaling factors are as follows (in order):
> Compositional field scaling factors = 1,1,2,1,0
> So upper, lower crust and the lithosphere have the same weight. However,
> when I look at the error indicator (and the resulting mesh), it looks like
> the refinement plugin prioritizes the boundaries of the c.f. over the
> interior (so basically it's looking at gradients, not c.f. value itself) --
> see screenshot composition_error.
>
> Can someone please have a look and tell me if it's just me or if the
> plugin is indeed not working properly?
>
> Thanks in advance!
>
> Best regards,
> Lev Karatun.
> <composition_error.png><composition_setup.png>________
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