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[Jan Stránský <question270627@xxxxxxxxxxxxxxxxxxxxx>]

Question #270627 on Yade changed:
https://answers.launchpad.net/yade/+question/270627

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello Romain,
please provide MWE [1] (try to make is as minimal as possible). Without the
code it is very hard to guess where the problem could be..
thanks
Jan

[1] https://yade-dem.org/wiki/Howtoask


2015-08-21 10:42 GMT+02:00 MOUSSIER <question270627@xxxxxxxxxxxxxxxxxxxxx>:

> New question #270627 on Yade:
> https://answers.launchpad.net/yade/+question/270627
>
> Hello everyone,
> I’m a new Yade user. I have made two different versions and there is
> something I don’t understand in the model behavior. Here is how I proceed:
> Clumps generation, version 1:
> I need two superposed volumes made by two different materials: the one
> above is built with horizontal layers (using the function “translate”) and
> the one below is just a cube.  At this stage we only use the function
> “translate” for the volume above and we can notice that the clumps inside
> this volume aren’t settling after adding the “gravity”.
> Clumps generation, version 2:
> The volume above is still built with horizontal layers (using the function
> “translate”). And, to improve the quality of the model we needed to
> subdivide the volume below in several vertical layers. So we necessarily
> need to use the function “translate” again. But, this time the clumps
> inside the volume above settle a lot (about 20cm on the top of the volume)
> after adding the gravity.
> It is important to notice that in each of those two versions, there is a
> separation box between the volumes above and below. This box aims at
> avoiding all interactions between those 2 volumes.
> Actions:
> In each volume the following operations are done (main steps): the clumps
> grow until a given pressure is reached between particles.  Then we add the
> gravity to particles. And then we let the soils stabilize (using
> getUBF<value).
> As we can see, the only change between generation 1 and 2 is that we use
> the function translate for one material in the first, and for both in the
> second. That is why I think the problem come from this function.
> So my question is: Do you also think the problem might come from the
> function “translate”? If not, with the information I have given to you, do
> you have any other idea?
> And if the problem come from the function “translate” do you have any idea
> to resolve it and how?
> Thanks for your answer
> Romain
>
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