yade-dev team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

Dear Yade devs,

Benjy Marks/Sydney is providing grain shape data from CT on Sand Atlas 
website 
<https://url.au.m.mimecastprotect.com/s/yQb_C5QPXJiglW59xIzXERg?domain=sand-atlas.scigem.com/> 
and he is interested in making that data compatible with direct imports 
in shape models. It seems to me in requires a bit of work on either Yade 
or Sand Atlas sides, or both.

IIRC Vasileios developed a tool to convert images into shape models 
already, Jérôme/Dany may have ideas for the case of level sets too. Others?

1/ Which would be the most basic and generic data format for raw data? 
(presumably voxel data)
2/ Which are the *available* functionalities to convert raw data into a 
DEM shape model?
3/ Which are the *unavailable* functionalities needed to convert raw 
data into a DEM shape model?

Cheers

Bruno



-------- Forwarded Message --------
Subject: 	Re: The Sand Atlas
Date: 	Wed, 24 Jul 2024 18:54:53 +0000
From: 	Benjy Marks <benjy.marks@xxxxxxxxxxxxx>
To: 	Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>, 
Bruno.Chareyre@xxxxxxxxxxxxxxxxxxxxxx 
<Bruno.Chareyre@xxxxxxxxxxxxxxxxxxxxxx>
CC: 	Ilija Vego <ilija.vego@xxxxxxxxxxxxx>



Hi Bruno,

Essentially we have the 3D data from CT scans of the particles and we 
are willing to convert them into whatever shape models yade developers 
would prefer. I'm impressed that yade accepts 5 different shape models! 
We can certainly produce 5 different file types and have them all 
available if the yade team thinks that will be useful. The main point 
for us is to make all of this existing data available and useful for as 
many people as possible.

Benjy

------------------------------------------------------------------------
*From:* Bruno Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>
*Sent:* Thursday, July 25, 2024 1:10:28 AM
*To:* Benjy Marks <benjy.marks@xxxxxxxxxxxxx>; 
Bruno.Chareyre@xxxxxxxxxxxxxxxxxxxxxx 
<Bruno.Chareyre@xxxxxxxxxxxxxxxxxxxxxx>
*Cc:* Ilija Vego <ilija.vego@xxxxxxxxxxxxx>
*Subject:* Re: The Sand Atlas

Dear Benjy,


Thank you for the suggestion, it sounds interesting. It seems it all 
depends on which shape model would be used:

- multisphere approximation
- raw polyhedron
- Minkowski polyhedron

- potential particle

- level set

- (other things I can't imagine and which aren't implemented in Yade a.t.m.)


That's five different "download for" already. :)
Do I miss something?


I'm not the most active in shape models actually. I should probably 
forward your proposition to other devs, or directly to yade mailing list.

But before that could you clarify what sort of data you would provide / 
how close to shape models it would be?

Kind Regards


Bruno



On 23/07/2024 00:51, Benjy Marks wrote:
> Hi Bruno,
>
> How are you? I hope you're well.
>
> We are putting together an open source repository called the Sand 
> Atlas 
> <https://url.au.m.mimecastprotect.com/s/yQb_C5QPXJiglW59xIzXERg?domain=sand-atlas.scigem.com/>. 
> It is a website for hosting 3d models of particles, so that they can 
> be used in DEM codes etc. I was wondering if this would be useful for 
> YADE? If so, I would like to make it just a single click on our 
> website where users can click "Download for YADE" and it gives them 
> correctly formatted files so that they can be used seamlessly. We will 
> try to do the same for other open source DEM codes too.
>
> The website now is more of a tech demo, many of the links dont work 
> and the particles arent meshed that nicely, but this will all 
> hopefully be sorted out in the next month. We also have asked around 
> to a bunch of researchers and hope to have 50+ particle types 
> available by September.
>
> If you have any feedback about the website, or ways that this kind of 
> data might be useful to you or others, please let me know!
>
> thanks,
> benjy
--

*Bruno Chareyre*
/Associate Professor
/

/*Grenoble INP - UGA**
*Institut d'ingénierie et de management / Graduate Schools of 
engineering and management**
46 av. Félix-Viallet - 38301 Grenoble
www.grenoble-inp.fr 
<https://url.au.m.mimecastprotect.com/s/mUDIC6XQ4LfVWGjm1u6CDu6?domain=grenoble-inp.fr>
/

/*3SR Lab**
*Soils, Solids, Structures, Risks**
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www.3sr.univ-grenoble-alpes.fr 
<https://url.au.m.mimecastprotect.com/s/i5P-C71R2NTERW4NQuBAaiU?domain=3sr.univ-grenoble-alpes.fr>
/