Hi Chiara,
Nice pinpointing. I'll try and have a look as soon as I have time. Maybe
I just forgot to update some wall-sphere code when I added energy
tracing in the sphere-sphere part.
Cheers.
Bruno
On 20/08/10 16:58, chiara modenese wrote:
Hi,
OK I found where is the problem. Please see the two attached figures
(for people interested in the topic see the previous post in this
thread). In one case I include friction between balls and boxes, in
the other only between balls. Energy is conserved even if the
simulation is _dynamic_ (good news), the problem is present only if
there is friction between balls and boxes. Please I need your help to
understand if this is a bug.
So question for everyone:
What is the difference in terms of computation of the shear behavior
between a box-sphere interaction and a sphere-sphere interaction?
Thanks a lot.
Chiara
On 12 July 2010 17:26, Bruno Chareyre <[email protected]
<mailto:[email protected]>> wrote:
Chiara, I found a problem in the script you use for comparing
energies in bouncing spheres.
The line O.materials[0].frictionAngle=radians(25) is changing
value in the material but it is not reflecting everything
automaticaly in interactions (tangent of friction is still 0 in
the contact law, but radians(25) is used for computing energy, so...).
By using
TriaxialCompressionEngine().setContactProperties(radians(25))
instead, I get something better. Total energy is still increasing,
but at least it will stagnate at a point.
Bruno
_______________________________________________
Mailing list: https://launchpad.net/~yade-users
<https://launchpad.net/%7Eyade-users>
Post to : [email protected]
<mailto:[email protected]>
Unsubscribe : https://launchpad.net/~yade-users
<https://launchpad.net/%7Eyade-users>
More help : https://help.launchpad.net/ListHelp
--
_______________
Bruno Chareyre
Associate Professor
ENSE³ - Grenoble INP
Lab. 3SR
BP 53 - 38041, Grenoble cedex 9 - France
Tél : +33 4 56 52 86 21
Fax : +33 4 76 82 70 43
________________
_______________________________________________
Mailing list: https://launchpad.net/~yade-users
Post to : [email protected]
Unsubscribe : https://launchpad.net/~yade-users
More help : https://help.launchpad.net/ListHelp
