Hi Gaël,
Thank you for your email. And no you are not colliding with my work
since I have it in mind but didn't start anything yet.
I would suggest you create a gitlab account if you don't have one so we
can add you as yade contributor.
You can then push your change to a branch. Something like (assuming you
modified the sources directly in local master branch):
/git push origin master:PFacetFix /
I'm eager to understand which problem you found. :)
Bruno
On 23/02/2021 21:59, Gael Lorieul wrote:
Hi 😊️
It has been a long time…
I have come accross thread #694548 on the "Yade-users" mailing list
(from January 2021), which concerned unphysical collisions between
PFacets (the dynamics of the rebound does not correspond to what one's
physical/common sense would expect).
I wanted to share that I encountered a very similar issue but with
gridConnection objects (I work with cylinders), and that I found a
solution. The latter should be easily extendible both to PFacet/PFacet
and PFacet/gridConnection collisions (although I only tested
gridConnection/gridConnection collisions). I am not sure how elegant
or computationally efficient it is, but it has given me good results
on the (very few) simulations I have tested it on.
I initially wanted to test my solution on full-scale simulations
before submiting it to the Yade code base, so as to present a code
that is robust and mature. But as it has been almost a full year since
then (the company I work for gave me assignments other than DEM), I
feel that perhaps I should reach out for other ways to share this
information…
This implies that although I am quite confident of my fix, I am not
100% certain either…
Perhaps a first step would be for me to present what I have found, and
how my fix works? I am not sure as to where to present it: This
mailing list? Thread #694548? You tell me 😉️
Gaël
PS: I have started to re-implement my solution in yade e07e530 (26 Nov
2020) (my previous implementation was based on yade 1b4ae97 (8 Feb
2020)). Hopefully the work I do on e07e530 will not be difficult to
port to the latest yade versions… (It seems the yade project started
using clang-format (or similar tool) sometime between e07e530 and
1b4ae97 so `diff` outputs half the file: not very helpful… 😆️)
PS2: Could thread #695558 be also concerned by this same uncorrect
physical behavior?
PS3: I hope that I am not colliding with Bruno's work on the subject
(according to Bruno's e-mail of Tue, 12 Jan 2021 07:50:51)
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