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[Luc Sibille <question243689@xxxxxxxxxxxxxxxxxxxxx>]

Question #243689 on Yade changed:
https://answers.launchpad.net/yade/+question/243689

    Status: Open => Answered

Luc Sibille proposed the following answer:
Hi Ehsan,
Unfortunately, I think there is no way to determine a priori the value of the damping to use to make your simulations. In my opinion, when you aim to simulate the dynamic behaviour of granular media (I think it is your case), the damping should be calibrated from simple tests (for instance the bounce of one grain over a layer of other fixed grains, or the attenuation of elastic waves measured with bender elements ...), as the contacts stiffnesses and friction are calibrated.

Besides, note that different kinds of damping can be used. There is for
instance a viscous damping introduced in the contact law, or the
Cundall's non-viscous damping (which consists more or less to play with
the inertia of grains). Cundall's damping may be more approriate to
simulate quasi-static behaviour, viscous damping may be more realistic
for dynamic simulation. I think you can find more details about that in
dedicated papers.

Luc

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