Dear Lammps Developers,
I am using gran/hook to simulate frictional particles.
pair_style gran/hooke 1 1 1 1 0.5 1
pair_style gran/hooke/history 1 1 1 1 0.5 1
provide tangential forces and make particles spin along z direction in 2d.
However, according to lammps documentation:
" The shear force is a “history” effect that accounts for the tangential displacement between the particles for the duration of the time they are in contact. This term is included in pair styles hooke/history and hertz/history, but is not included in pair style hooke"
Therefore, gran/hooke should not give rise to tangential forces !
What is really the difference between
In advance, I appreciate your kind reply.