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Re: hello? -help with a spinning bucket!


hehe.. you couldn't be more clear than that! :-)

I have now explored the effect of decreasing young's modulus to increase the time-step, to get results faster.  here is a link to a video, there are two more as well..:  http://www.youtube.com/watch?v=Za0guWwcQnk

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 think I will have to re-do these simulations with larger numbers of particles, and for longer time periods, and with a young's modulus closer to what it is in reality.

However, it is looking like the simulation I will need to do to check whether my ideas will work might take days of computer time.. (laptop time).  it might be better at that point, (remembering that I will have to do maybe 10's of major simulations to convince myself that I have really understood how to use the program) to just go ahead and get the machine-shop to build the experimental apparatus (a days worth of work for them at most), to test the idea..

how long do you folks usually run your simulations for?

--- On Thu, 7/8/10, Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx> wrote:

From: Bruno Chareyre <bruno.chareyre@xxxxxxxxxxx>
Subject: Re: [Yade-users] hello? -help with a spinning bucket!
To: yade-users@xxxxxxxxxxxxxxxxxxx
Received: Thursday, July 8, 2010, 2:11 PM


          that's a hell of a lot

of iterations!  for one second!  is it really necessary?



Yes it is. But if you decrease stiffness, dt will be higher.



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