Question #670501 on Yade changed:
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Status: Open => Answered
Jan Stránský proposed the following answer:
> they seem just to disappear
> they move very quickly
as you already guessed, the time step is too large (in both cases).
Jan
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Question #670501 on Yade changed:
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rhaven gave more information on the question:
Hi Jan,
Thank you for the reply. I also tried O.dt=5000*PWaveTimeStep(), and the clumps
do fall uniformly in the -z direction. However, they do not stop when
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Jan Stránský posted a new comment:
> I mean the clumps do not fall uniformly in -z direction
In my case, I got perfect uniform free fall in -z direction..
> Could you specify the timestep you used?
e.g.
Question #670501 on Yade changed:
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Status: Needs information => Open
rhaven gave more information on the question:
> Please be more specific about "do not settle"
I mean the clumps do not fall uniformly in -z direction
Could you specify
Question #670501 on Yade changed:
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Status: Open => Needs information
Jan Stránský requested more information:
> Did you modify the script?
Yes, I have modified the script (e.g. I have deleted raw_input which has
no place in MWE)
> What did
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Answered => Open
rhaven is still having a problem:
Hi Jan,
What did you use for a timestep??
Did you modify the script?
many thanks
Jesse
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Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Answered => Open
rhaven is still having a problem:
Thank you for the reply. Ill try to calculate the maximum stable time
step
Unfortunately, regardless of my choice of timestep, the clumps do not
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Open => Answered
Jan Stránský proposed the following answer:
> Is there a general guidline as to the maxmium for O.dt?
yes, do not use higher time step than the critical one :-)
> 3 or 4 of the
Question #670501 on Yade changed:
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Status: Open => Answered
Bruno Chareyre proposed the following answer:
https://yade-dem.org/doc/formulation.html#stability-considerations
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Question #670501 on Yade changed:
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Status: Answered => Open
rhaven is still having a problem:
Thank you Jan for the reply,
Is there a general guidline as to the maxmium for O.dt?
Ive increased the timestep by 5 times and the 3 or 4 of the
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Bruno Chareyre proposed the following answer:
>you can use larger timestep than PWaveTimeStep as the mass of a clump
is higher than that of a single sphere
Note that GlobalStiffness time stepper accounts for
Question #670501 on Yade changed:
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Status: Open => Answered
Jan Stránský proposed the following answer:
> Im looking at the gui
this might be misleading, always try to get a numeric evidence for your
conclusions..
> I guess the timestep is
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Answered => Open
rhaven is still having a problem:
Hi Jan,
Im looking at the gui, in the 3D viewport the clumps dont move, I left it
running for 10 minutes or so.
If the clumps are moving I guess
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Open => Answered
Jan Stránský proposed the following answer:
> however the clumps still dont fall
please provide us with the info how you know this (visually from GUI,
printing displacement ...)
I
Question #670501 on Yade changed:
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rhaven gave more information on the question:
I've also pasted clump0.txt here https://pastebin.com/WY703ZLs
and clump1.txt here: https://pastebin.com/KNacYF9N
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Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
rhaven gave more information on the question:
I found another thread which used makeclumpcloud and gravity
(https://answers.launchpad.net/yade/+question/290933)
I added the following two lines to see if they
Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Needs information => Open
rhaven gave more information on the question:
Sorry!
The two files clump0.txt and clump1.txt I have pasted here
https://pastebin.com/APtLQdvH
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Question #670501 on Yade changed:
https://answers.launchpad.net/yade/+question/670501
Status: Needs information => Open
rhaven gave more information on the question:
Hi Jan,
It should work as extend was a global variable.
In case it still doesnt work, Ive moved the section where extend is
Question #670501 on Yade changed:
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Jérôme Duriez posted a new comment:
Note that for
https://yade-dem.org/doc/tutorial-examples.html#gravity-deposition (and
probably your example as well ?), you also have
"
yade.plot: creating fake plot, since
Question #670501 on Yade changed:
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rhaven gave more information on the question:
Thank you very much Jan for the quick reply! Indeed O.run was needed.
Unfortunately the gravity doesnt seem to influence the clumps.
Ive update the code
Question #670501 on Yade changed:
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Jan Stránský posted a new comment:
Hello,
concerning plot "error":
> but end up with error
> UserWarning: No labelled objects found. Use label='...' kwarg on individual
> plots.
it is not an error, just a
Question #670501 on Yade changed:
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rhaven gave more information on the question:
if there is a better way to generate the geometry I would be also
interested to hear it
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New question #670501 on Yade:
https://answers.launchpad.net/yade/+question/670501
Hi,
I am trying to use gravity (based on the gravity deposition example) to fill a
volume with clumps and have them fall. I have several issues at the moment
however. When I use makeClumpCloud to add clumps to the
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