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Re: [Question #404363]: porosity calculation for clumps

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Bruno Chareyre <question404363@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 24 Nov 2016 14:43:22 -0000
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Question #404363 on Yade changed:
https://answers.launchpad.net/yade/+question/404363

    Status: Open => Answered

Bruno Chareyre proposed the following answer:
Hi Bettina,
You find out that the volume(or mass) of the clump is calculated correctly (your third value).
The porosity is not and that is expected, because the porosity function just take the volumes all clump members without looking at overlaps between them (you can even have negative porosity as a consequence). De facto, the documentation of this function is mentionning spheres and only that, not clumps.
myClumpPorosity() is correct
There is also voxelPorosity, which should be be correct at the price of extra computation time.
Bruno

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