yade-users team mailing list archive

[Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>]

> , [...] particle radius is 1e-3 m, one particle is static, another one 
> is 20m/s [...]
> rotational_speed= rotational_speed + rotational_acceleration * dt = 0 
> + (5e9)*(1e-6)= 5e3 rad/sec !!!!!! WRONG!!!!

Why wrong? If I take the translational velocity divided by the radius, 
it gives 20/1e-3 = 2e4 rad/s, the same order of magnitude as 5e3 rad /s. 
So I'd say it is consistent (imagine the mobile particle has to roll on 
the other one with this initial velocity, a fraction of the initial 
momentum is converted into rotational momentum, that is why 5e3 is lower 
than 2e4).

Bruno


>     _______________
>     Chareyre Bruno
>     Maitre de conference
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>     Grenoble INP
>     Laboratoire 3SR - bureau E145
>     BP 53 - 38041, Grenoble cedex 9 - France
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--

_______________
Chareyre Bruno
Maitre de conference

Grenoble INP
Laboratoire 3SR - bureau E145
BP 53 - 38041, Grenoble cedex 9 - France
Tél : 33 4 56 52 86 21
Fax : 33 4 76 82 70 43
________________