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[Jan Stránský <question706187@xxxxxxxxxxxxxxxxxxxxx>]

Question #706187 on Yade changed:
https://answers.launchpad.net/yade/+question/706187

    Status: Open => Answered

Jan Stránský proposed the following answer:
> What could be the reason?

No idea without a MWE [1]

> Is there an approach to accurately calculate the moment of inertia for
a clump of facets regarding that facets do not have volume.

something like sum(m_i * r_i^2), depending on your needs (blocked rotation along x and z or not, ...), see [2].
zero volume is not important, partial masses m_i and center of masses r_i matter. Should not be difficult for triangular facets.

Cheers
Jan

[1] https://www.yade-dem.org/wiki/Howtoask
[2] https://en.wikipedia.org/wiki/Moment_of_inertia

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