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Referred to here: https://bugs.launchpad.net/yade/+bug/1070744I tried to understand how to calculate torsional moments for clumps. Please have a look at the pictures in the attachment (see link above). There two clumps are shown and I do not understand how their torsional moments can be calculated. In the first picture there is box clumped with a "half sphere". In the second picture you can see a box inside a sphere, like I want to model my sand grains in future. How is torsional moment calculated in this cases?
Can this be simulated with RotationEngine already?
For box-box interactions, there is a serious background in 3-DEC from itasca, where arbitray polyhedral shapes are modelized. It should apply to boxes.
Hm, I think in the case of cubids (boxes) it should be much easier, than a general polyhedral shape.
My only question is if it is really necessary to modelize angular vertices instead of rounded shapes.
If I want to model rounded shapes, I could clump spheres, as it is already possible in Yade ... but this is also a nice idea.
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