[aspect-devel] Questions about surface process

John Naliboff jbnaliboff at ucdavis.edu
Fri Dec 9 11:03:02 PST 2016

Hi Yimin,

I believe a number of people implemented a preliminary" diffusive" surface erosion model this summer.  However, I’m not sure what the status is of further development pushing it to the main branch.  Hopefully someone can chime in on this.  


John Naliboff
Assistant Project Scientist, CIG
Earth & Planetary Sciences Dept., UC Davis

> On Dec 9, 2016, at 2:30 AM, Yimin Jin <choby1234567 at gmail.com> wrote:
> Dear developers of ASPECT:
> I am a student of University of Chinese Academy of Sciences and I have been using ASPECT to do simulations on crack propagation of small-scaled geological bodies in the passing year. I have found that the existing velocity pojection strategies in the free-surface module introduces too much error to the result (the 'normal' strategy leads to severe distortion of cells, and the 'vertical' strategy ignores horizontal displacements), while the sticky-air method will double the computational complexity of the problem (my model can 'grow' tall so the air layer must be thick enough). Therefore I intended to apply a diffusive surface process on the free-surface, but when I looked into this problem I found it quite difficult because the partition changes each time we execute refinement and coarsening. The finest way seems to be transporting faces between processes using functions provided by p4est (I don't know if there are any), then it will be unavoidable to read the codes of p4est. Could you please tell me whether you have started to do such things or not?  If it has been implemented and will soon be released, then I will be happily looking forward to the next version of ASPECT; otherwise, I would like to make my effort in this part of work.
> Cincerely,
> Yimin Jin
> Key Laboratory of Computational Geodynamics, UCAS
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