Hi all,
I already read the documentation about the contact model but I still can't get it.
(https://www.cfdem.com/media/DEM/docu/gran_model_hertz.html)
I understand the equation about the contact force but how can we calculate the normal overlap, tangential overlap,
normal relative vel, tangential relative vel in the LIGGGHTS?
I searched the code 'contact_model_hertz.h' for detail but can't understand how those are calculated.
Can anyone explain this for me?