[aspect-devel] The problem of setting up initial composition

[Nan Zhang]

Thanks! It makes more sense. I will do more tests.

Nan

On Tue, Jan 26, 2016 at 9:57 PM, Wolfgang Bangerth <bangerth at tamu.edu>
wrote:

>
> Nan,
>
> I can calculate the composition field now. I added one composition to
>> shell_simple_3d.prm for a test. What I got is very confusing(attached)!
>> When I
>> plot the initial c_1 contour with c_1=0.9, I got this figure. I do not
>> understand the rhombus shape anomaly? Is this related to the thermal
>> initial
>> condition? I expect a flat surface.
>>
>
> What you get to see in the visualization program is not the initial
> condition you describe, but the function *as interpolated onto your mesh*.
> You are using a mesh that is adaptively refined, i.e., there are small and
> large cells in the area where your initial condition drops from >0.9 to
> <0.9, and consequently the surface looks like it does. Does this make sense?
>
>
> Best
>  W.
>
> --
> ------------------------------------------------------------------------
> Wolfgang Bangerth               email:            bangerth at math.tamu.edu
>                                 www: http://www.math.tamu.edu/~bangerth/
>
>
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