ESyS-Particle

About the HertzMindlinPrms InteractionGroup

Asked by Lukas Liebisch

Hi,

I was trying to figure out which InteractionGroup to use for friction between rotational particles when I saw that an InteractionGroup HertzMindlinPrms exists. Before considering whether or not using Hertz-Mindlin-theory for my problem (simulating the evolution of fold-thrust-structures) makes sense, I wanted to ask if that InteractionGroup works for both rotational and non-rotational particles and if it works in both 2D and 3D. The documentation on http://esys.geocomp.uq.edu.au/esys-particle_python_doc/current/pythonapi/html/esys.lsm.LsmPy.HertzMindlinPrms-class.html is not giving me the information I'm looking for, so I hope one of you can shed some light on this.

Best regards,
Lukas

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Dion Weatherley
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Best Dion Weatherley (d-weatherley) said : 		#1

Hi Lukas,

The HertzMindlinPrms interaction group is only intended for non-rotational particles. No moments are calculated or imparted when using this interaction group in a RotSphere simulation.

If you require frictional interactions in rotational simulations, the best option is FrictionPrms (or its parent class RotFrictionPrms). This interaction group has been well tested for both fracture mechanics and granular flow applications.

Cheers,

Dion

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Lukas Liebisch (lliebisch) said : 		#2

Thanks Dion Weatherley, that solved my question.