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[Anton Gladky <question225776@xxxxxxxxxxxxxxxxxxxxx>]

Question #225776 on Yade changed:
https://answers.launchpad.net/yade/+question/225776

Anton Gladky proposed the following answer:
Hi, my 2cts.

You can have a look in the source code, where friction angle is
calculated and implemented [1], especially lines 67, 72, 231 and 383.
They will give you an exact information about friction angle in this
constitutive law in Yade. Actually, in other DEM-codes AFAIK the
implementation is almost the same.

I do not think, that the friction angle is the parameter, which will
sufficiently influence on the "macro"-results of your simulation. You
will, probably, get a noticeable difference, say, between mu=0 and
mu=0.2, but you will unlikely see a big difference between mu=0.2 and
mu=0.5. You should check and decide, whether you really need set the
friction angle so accurately.

Cheers,

[1]
https://github.com/yade/trunk/blob/master/pkg/dem/HertzMindlin.cpp#L67

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