yade-users team mailing list archive

[Bettina Suhr <question683405@xxxxxxxxxxxxxxxxxxxxx>]

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) differences. I’m a bit worried, because I do not see such differences between Yade 2018.02b and Yade 2019.01a. 

An example for the obtained differences can be seen in the 03-oedometric-test.py script. I added “seed=1” in the makeCloud command and obtain identical initial positions for the spheres (wrt. yade version). The particles settle under gravity. When the  unbalanced force is below 0.1,  a plate is inserted for compression.  The position of the plate is above the highest sphere in the packing and already here there are differences  (note: I changed the PyRunner iterPeriod for a better comparison: PyRunner(command='checkUnbalanced()',iterPeriod=100,label='checker') )

#add plate at position:  0.549239607153 at iteration:  10300 # Yade 2018.02b
#add plate at position:  0.549239607153 at iteration:  10300 # Yade 2019.01a
#add plate at position:  0.575951497648 at iteration:  9800# yade gitlab compiled with Python 2
#add plate at position:  0.5759514976482029 at iteration:  9800# yade gitlab compiled with Python 3

For backward compatibility, I think it’s worth investigating, what causes these changes. Do you agree? 
Do you have any suggestion, how I can track these changes down?

Thanks and best regards,
Bettina


-- 
You received this question notification because your team yade-users is
an answer contact for Yade.