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Re: hello? -help with a spinning bucket!


thank's for the tip :-D

I will look into that in more detail, and get back to you if anything escapes me. :)

for the behavior I expect, I expect the beads to 'glue' themselves to the walls of the rotating container, ultimatelly forming a hollow cone in the middle of the container for the case of small particles and high rotational velocities.  I would ultimately like to simulate 1mm^3 particles in a 1 litre cylinder, rotating at up to 5000 rpm.  see this paper for an example:  


and you leave me wondering.. would these high velocities necessarilly mean that I would need an even smaller timestep than has already been stated that I need?  It seems so small already, I would be inclined to doubt it..


-mike :)
--- On Thu, 7/8/10, Sergei D. <sj2001@xxxxxxxxx> wrote:

From: Sergei D. <sj2001@xxxxxxxxx>
Subject: Re: [Yade-users] hello? -help with a spinning bucket!
To: yade-users@xxxxxxxxxxxxxxxxxxx
Received: Thursday, July 8, 2010, 3:31 PM

08.07.2010 22:27, Michael Jensen:

> there is still funky stuf happening, I don't see the behavior I am
> expecting, not yet, but this is at least a lot better than anything I
> got earlier :-)

I do not know what behavior you expect and what the interaction law using, but just in case,   do you aware about differencies in  behaviour with cundall and viscoelastic damping for a dynamic simulation? see, for example, scripts in examples/dynamic_simulation_tests

and yes, you have very fast velocities, so you need very tiny dt...

-- Best regards,

Sergei Dorofeenko,
Cand. Phys.-Mat. Sci.

Institute of Problems of Chemical Physics,
Chernogolovka, Moscow region, Russia.

e-mail: dorofeenko@xxxxxxxxx

-- Best regards,
Sergei D.

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