[aspect-devel] Initial mesh with heterogeneous mesh-spacing

[Ravi Kanda]

Timo, Max:
Thank you for the quick responses.
Ravi.

On Mon, Jun 25, 2018 at 2:44 PM Max Rudolph <maxrudolph at ucdavis.edu> wrote:

> Try using the 'Minimum refinement function' criterion for the initial
> adaptive refinement.
>
> On Mon, Jun 25, 2018 at 1:26 AM Ravi Kanda <kanda.vs.ravi at gmail.com>
> wrote:
>
>> Hi all,
>>
>> I am trying to figure out how to define an initial mesh configuration
>> such that regions near the boundary have coarser resolution than the
>> interior (2D cartesian only, at the moment). Specifically, I want an
>> interior sub-domain (whose top surface is at the free-surface) having a
>> much higher resolution - crudely illustrated by the attached JPG.  Note
>> that I intend this finer resolution domain to be a purely
>> geometric/geographic construct (e.g., corresponding to higher resolution
>> geophysical data that I may want to compare to later).  The subdomain
>> does not necessarily correspond to any specific state-variable such as
>> composition, density temperature, or velocity (/strain) gradients.  This
>> initial mesh may be further refined by other strategies (temperature,
>> strain-rate, composition, etc.) at subsequent time-steps, but I want the
>> model to start with, this initial heterogeneous mesh configuration as a
>> minimum starting resolution of the entire domain.
>>
>> I went through Appendix A of the Aspect 2.0 manual describing the PRM
>> runtime parameters, specifically, "Geometry model", and
>> "Discretization", and ran some text searches within the document for
>> relevant keywords.  I see you can set a uniform discretization (number
>> of divisions) along each model dimension (x/y-repetitions), but not sure
>> how to vary the nodal frequency as a function(x,y). Given I haven't yet
>> done a thorough read of the manual, it is likely I may have missed it .
>>
>> I will really appreciate any suggestions or tips (or even where to look).
>>
>> Thanks,
>> Ravi.
>>
>> --
>> ---------------------------------------------------------------------
>> Ravi Kanda
>> Research Fellow
>> Department of Geology
>> Utah State University
>> 4505 Old Main Hill
>> Logan UT 84322-4505
>> --------------------------
>> Web Page: https://ravi-vs-kanda.github.io
>>
>> ----------------------------------------------------------------------
>> For a human being, the unexamined life is not worth living - SOCRATES
>> ----------------------------------------------------------------------
>>
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>
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-- 
----------------------------------------------------------------------
Ravi Kanda
Research Fellow
Department of Geology
Utah State University
4505 Old Main Hill
Logan UT 84322-4505
--------------------------
Web Page: https://ravi-vs-kanda.github.io

----------------------------------------------------------------------
For a human being, the unexamined life is not worth living - SOCRATES
----------------------------------------------------------------------
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