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Re: [Question #260561]: Cohfrictmat Spheres Dissappearing on Contact

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From: Jérôme Duriez <question260561@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 13 Jan 2015 16:31:43 -0000
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Question #260561 on Yade changed:
https://answers.launchpad.net/yade/+question/260561

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Few suggestions :

- did you try other timestep values ?

- if the position becomes "nan" in one time step, maybe could there be something wrong with the parameters. Give a close look to the parameters values that are in the end used by Yade (it is quite easy with the Inspector : "Inspect" button, especially for a 3 particles simulation). 
I fear some problems in your parameters definition. For instance, 2/3 is equal in python to 0, because of numeric types (whereas 2./3. = 0.6666666667)

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