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[Jérôme Duriez <question267328@xxxxxxxxxxxxxxxxxxxxx>]

Question #267328 on Yade changed:
https://answers.launchpad.net/yade/+question/267328

Jérôme Duriez proposed the following answer:
Indeed, makeCloud is designed to generate a "gas" of particles: samples with very high porosities (e.g. voidVolume = 0.7 totalVolume). Such samples are obtained through random attempts to put spheres inside a given volume (between minCorner and maxCorner), checking that there is no contact between spheres.
If, at one point, the random attempts fail to find an empty space for new spheres, the final number of spheres can be much lower than the expected number.

In the end, this function is not appropriate to your goals, as Jan
pointed out. In addition to the proposed functions, a classical workflow
is to use "makeCloud" to generate a sample similar to the one sought (in
terms of particle number and psd), and, then, to reach desired porosity
through the simulation of an isotropic compression.

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