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Re: [Question #661926]: REFD method with clumps, but maintaining the proportion of clumps

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Bruno Chareyre <question661926@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 20 Dec 2017 19:02:25 -0000
Reply-to: question661926@xxxxxxxxxxxxxxxxxxxxx
Sender: bounces@xxxxxxxxxxxxx

Question #661926 on Yade changed:
https://answers.launchpad.net/yade/+question/661926

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Thank you for shortening the script.
It seems you found a bug but I don't understand what happens in details, yet. 

If you comment out "O.bodies.updateClumpProperties(discretization=250)" they grow as expected.
It seems the functions growParticles and updateClumpProperties don't play well together.

>a value that follows: new_radius=(multiplier^number_of_clumps)*initial_radius
That's exactly what your algorithm does indeed since you execute growParticles(multiplier=2) as many times as the number of clumps in O.bodies.

Before the bug is fixed I would suggest to not use
updateClumpProperties() in your case (you can always change mass/inertia
manually if needed), then the problem shoud dispapper.

Regards

Bruno

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