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Message #03360
Re: Elastic energy
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To:
yade-users@xxxxxxxxxxxxxxxxxxx
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From:
Janek Kozicki <janek_listy@xxxxx>
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Date:
Sat, 3 Jul 2010 01:23:07 +0200
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Face:
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In-reply-to:
<AANLkTikjDYXiM2frIAHuSDlOcgK9m6-wDrxOcnqE7vDn@mail.gmail.com>
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 box.
> I attach the script, if you run it you will obtain the plot in the attached
> figure. If there is no friction, then total energy is more or less constant
> as shown in the first part of the plot (not exactly constant due to the way
> 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 energy
> decreases and no slip occurs since the function plasticDissipation() of
> Law2_ScGeom_FrictPhys_Basic contact law returns 0. I have already checked on
> paper and discussed with Bruno and the code which computes
> plasticDissipation in ScGeom is formally correct.
How about heat? Usually friction goes to increasing temperature of those
--
Janek Kozicki http://janek.kozicki.pl/ |
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