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[Question #181608]: Viscous damping of clumps

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Klaus Thoeni <question181608@xxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 12 Dec 2011 05:01:03 -0000
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New question #181608 on Yade:
https://answers.launchpad.net/yade/+question/181608

Hi guys,

I was wondering if someone has experience with viscous damping of clumps. I implemented viscous normal damping for the standard FrictMat using a critical damping ratio beta the same way as it is used in PFC. I did a simple drop test of one sphere and a sphere made by clumped particles. They have the same mass. However, the drop test shows a different behaviour if beta!=0 (e.g. if viscous damping is activated). It seems that the critical damping constant must be different to get a similar behaviour. Any comments and suggestions?

I can commit the code and provide an example if needed.

Cheers

Klaus

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