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Re: Elastic energy
On 2 July 2010 23:27, Janek Kozicki <janek_listy@xxxxx> wrote:
> (sorry, working over vnc caused me to accidentally send before I
> finished writing this email - sending again)
> chiara modenese said: (by the date of Fri, 2 Jul 2010 17:41:36 +0100)
> > Hi guys,
> > I am experiencing again a bit of troubles with total energy conservation.
> > For a sphere-sphere impact test everything seems fine. Now I have tried
> > another simple example: few spheres with an input initial velocity in a
> > I attach the script, if you run it you will obtain the plot in the
> > figure. If there is no friction, then total energy is more or less
> > as shown in the first part of the plot (not exactly constant due to the
> > we compute velocities, as already discussed in this thread
> > http://www.mail-archive.com/yade-users@xxxxxxxxxxxxxxxxxxx/msg01729.html
> > However, as long as I include some friction, both total and kinetic
> > decreases and no slip occurs since the function plasticDissipation() of
> > Law2_ScGeom_FrictPhys_Basic contact law returns 0. I have already checked
> > paper and discussed with Bruno and the code which computes
> > plasticDissipation in ScGeom is formally correct.
> How about heat? Usually friction increases temperature of those
> bodies that are in friction. But in yade we don't have heat, so this
> turns into an energy loss.
In fact there is no heat effect at all in Yade, Janek could you elaborate
your thought? Energy must be conserved as long as the system is closed. I am
trying to see in a TT simulation what happens. Bruno, have you tried it?
Actually I am thinking to inlcude in the TTRecorder the various energy
terms, mechanical energy and so on.
> Janek Kozicki http://janek.kozicki.pl/ |
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