New question #263553 on Yade:
https://answers.launchpad.net/yade/+question/263553
Dear all,
after using yade for a while, this is the first time that I try to do coding. I
created a new class in the pkg/dem folder and have some questions regarding
the compilation.
1. After calling cmake,
Question #263553 on Yade changed:
https://answers.launchpad.net/yade/+question/263553
Status: Answered = Solved
Bettina Suhr confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.
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New question #269739 on Yade:
https://answers.launchpad.net/yade/+question/269739
Dear all,
I found a nice publication for the verification of the Hertz-Mindlin contact
model:
Chung, Y. Ooi, J. Benchmark tests for verifying discrete element modelling
codes at particle impact level Granular
Question #269739 on Yade changed:
https://answers.launchpad.net/yade/+question/269739
Status: Answered = Solved
Bettina Suhr confirmed that the question is solved:
Dear Bruno,
thank you for you help. You are right, starting from the analytical solution
for the contact of two spheres
Question #269739 on Yade changed:
https://answers.launchpad.net/yade/+question/269739
Status: Answered = Open
Bettina Suhr is still having a problem:
Hi Bruno and Anton,
thanks for your comments.
@Bruno: You are right: the contact stiffness of the wall-sphere contact is
equal to the case
New question #268970 on Yade:
https://answers.launchpad.net/yade/+question/268970
Dear all,
I downloaded and installed yade trunk version 1.14.0 on a computer running with
Debian.
When I started the performance test using only one kernel, everything was ok.
As soon as more kernels are
Question #268970 on Yade changed:
https://answers.launchpad.net/yade/+question/268970
Status: Open = Solved
Bettina Suhr confirmed that the question is solved:
We changed back from Debian to Ubuntu and everything is ok now.
Regards,
Bettina
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New question #275459 on Yade:
https://answers.launchpad.net/yade/+question/275459
Dear all,
I simulate direct shear tests using the Hertz-Mindling contact law with damping
(given coefficient of restitution). By chance I saw that there exist contacts
where F_t > mu F_n, which violates the
Question #275459 on Yade changed:
https://answers.launchpad.net/yade/+question/275459
Status: Answered => Solved
Bettina Suhr confirmed that the question is solved:
Thank you, Li Chang-Sheng and Bruno.
Your answers made the whole topic much clearer for me.
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Question #275459 on Yade changed:
https://answers.launchpad.net/yade/+question/275459
Bettina Suhr gave more information on the question:
Hi lichangsheng,
thanks for you answer. I had a look at (cundall, 1979). There it says
“The viscous damping in shear direction is not applied when sliding
New question #284985 on Yade:
https://answers.launchpad.net/yade/+question/284985
Dear all,
I do simulations using clumps of spheres with regular saves using O.save().
While the simulation finishes normally, I get segfaults when I load the saved
states.
The example test/clumpPack.py shows
Question #289663 on Yade changed:
https://answers.launchpad.net/yade/+question/289663
Bettina Suhr posted a new comment:
Hi Jiangtao,
I used the Hertz-Mindlin model for some time, but I never looked at the
energies.
As I read the source code, in shearEnergy not only the current increment
Question #289663 on Yade changed:
https://answers.launchpad.net/yade/+question/289663
Bettina Suhr posted a new comment:
Hi Jiangtao,
sorry, but it is still not clear to me, what exactly is your question. Would
you like to calculate the change in shear energy between two moments in time?
You
Question #290950 on Yade changed:
https://answers.launchpad.net/yade/+question/290950
Bettina Suhr posted a new comment:
Hi Varun,
your last MWE script worked for me, using yade-1.20.0. No spheres
crossed the boxes and nothing dissapeared. If you continue to face
problems, you could try
New question #290933 on Yade:
https://answers.launchpad.net/yade/+question/290933
Dear all,
I would like to generate a packing of clumps inside a box, where at front and
back of the box periodic boundary conditions are applied. At first, I defined
the periodic cell and then added a facet box
Question #290933 on Yade changed:
https://answers.launchpad.net/yade/+question/290933
Bettina Suhr posted a new comment:
Hi Jerome and Anton,
thank you very much for your answers.
@Anton: I’m sorry, there’s a typo in the wallMask in the definition of the
facet box (at the moment
Question #290950 on Yade changed:
https://answers.launchpad.net/yade/+question/290950
Bettina Suhr posted a new comment:
Hi Varun,
maybe I have the same problem as you have. Yesterday, I posted a
question (290933). There is a minimal working example (with a typo,
please change the definition
New question #404363 on Yade:
https://answers.launchpad.net/yade/+question/404363
Dear all,
in simulations using clumps of overlapping spheres, I was wondering if the
porosity is calculated correctly.
Using the following example, I obtain the same results with yade-1.20.0 and
yade-2016.06a:
Question #404363 on Yade changed:
https://answers.launchpad.net/yade/+question/404363
Status: Answered => Solved
Bettina Suhr confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.
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Question #403744 on Yade changed:
https://answers.launchpad.net/yade/+question/403744
Bettina Suhr proposed the following answer:
Hi Luis,
did you check the includeAdhesion option in the Hertz-Mindlin law? The
description is not very detailed, but you can check the code to see, if that is
what
Question #404466 on Yade changed:
https://answers.launchpad.net/yade/+question/404466
Bettina Suhr proposed the following answer:
Hi Abimael,
when I want to generate samples made of clumps I use „makeClumpCloud“.
You can find an example script at
trunk/examples/test/clumpPack.py
This avoids
Question #679419 on Yade changed:
https://answers.launchpad.net/yade/+question/679419
Status: Answered => Solved
Bettina Suhr confirmed that the question is solved:
Dear Janek and Vaseileios,
thank you very much for your answers! This information helps a lot.
I will try to comp
Question #680139 on Yade changed:
https://answers.launchpad.net/yade/+question/680139
Bettina Suhr confirmed that the question is solved:
Thanks Bruno Chareyre, that solved my question.
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Question #680139 on Yade changed:
https://answers.launchpad.net/yade/+question/680139
Status: Answered => Solved
Bettina Suhr confirmed that the question is solved:
Thank you, Bruno!! This command makes life much easier.
For the record, the MWE below is working (This reads
trunk/examp
Question #680203 on Yade changed:
https://answers.launchpad.net/yade/+question/680203
Status: Open => Answered
Bettina Suhr proposed the following answer:
Hi,
it seems to me your problem is not related to the usage of a cluster.
Reading your error message, the problem is cau
New question #681609 on Yade:
https://answers.launchpad.net/yade/+question/681609
Dear all,
we just bought a new computer for DEM simulations. After a first performance
test with yade, I saw that the IT turned on hyper-threading. Is there a general
advice to use or not to use hyper-threading
Question #680139 on Yade changed:
https://answers.launchpad.net/yade/+question/680139
Status: Answered => Open
Bettina Suhr is still having a problem:
Dear Bruno,
thank you very much for your advice. It’s a good idea to add
nodes+edges+pfacets to the clump.
In my script, I tried to
New question #680139 on Yade:
https://answers.launchpad.net/yade/+question/680139
Dear all,
recently I saw the pfacet element implemented in yade and had a look at
[Effeindzourou2016].
The pfacets seem to be constructed to model deformable objects, like membranes.
I was wondering if it is
New question #683405 on Yade:
https://answers.launchpad.net/yade/+question/683405
Dear all,
until now, I used Yade 2019.01a for my computations. Recently, I also
downloaded and installed the current version from gitlab. When I compare the
results obtained from both versions, I see (small)
Question #683488 on Yade changed:
https://answers.launchpad.net/yade/+question/683488
Status: Open => Answered
Bettina Suhr proposed the following answer:
Hi Jinni Kim,
There are different ways to save data for different purposes.
Have a look at the tutorial -> oedometric script
Question #683405 on Yade changed:
https://answers.launchpad.net/yade/+question/683405
Bettina Suhr posted a new comment:
Dear Bruno,
Thanks a lot for your answer and your suggestions.
The time steps are the same as well as the initial positions of the
spheres.
Due to some technical
Question #683176 on Yade changed:
https://answers.launchpad.net/yade/+question/683176
Status: Open => Answered
Bettina Suhr proposed the following answer:
Dear lip,
You might want to check the “trunk/examples/clumps” folder , for
examples how clumps are defined.
Regarding your questio
Question #683405 on Yade changed:
https://answers.launchpad.net/yade/+question/683405
Status: Answered => Open
Bettina Suhr is still having a problem:
Dear all,
I tried to do the checks, which Bruno suggested, but I didn’t succeed.
After checking out the commit 900c7616, running cm
Question #681609 on Yade changed:
https://answers.launchpad.net/yade/+question/681609
Status: Answered => Solved
Bettina Suhr confirmed that the question is solved:
Dear Robert, Jerome and Bruno,
Thank you very much for your answers. With this information at hand, we
will think ab
Question #692608 on Yade changed:
https://answers.launchpad.net/yade/+question/692608
Status: Open => Answered
Bettina Suhr proposed the following answer:
Hi,
I think it is correct that the interaction direction is returning values
between 0 and 179.
Imagine two spheres in cont
Question #697142 on Yade changed:
https://answers.launchpad.net/yade/+question/697142
Status: Answered => Open
Bettina Suhr is still having a problem:
Hi Vasileios,
Thank you for the explanation, now I understand better why I have this
problem.
Your suggestion to
Question #697142 on Yade changed:
https://answers.launchpad.net/yade/+question/697142
Status: Answered => Solved
Bettina Suhr confirmed that the question is solved:
Thank you, Jan! The dynamic cast works really fine.
The std::swap caused a compilation error, but it was easy to av
Question #697142 on Yade changed:
https://answers.launchpad.net/yade/+question/697142
Bettina Suhr confirmed that the question is solved:
Thanks Jan Stránský, that solved my question.
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New question #697142 on Yade:
https://answers.launchpad.net/yade/+question/697142
Dear all,
Currently, I try to write a new Ip2 functor and after some trouble I have a
general question on the order of two contacting particles in the interaction
class.
Say I have:
spheres with myMaterial
Question #703081 on Yade changed:
https://answers.launchpad.net/yade/+question/703081
Status: Open => Answered
Bettina Suhr proposed the following answer:
Hi Lukas,
When I worked with filterSpherePack function, I made some observations,
which might be helpful.
> Since in [1] the pa
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