Figure 1
From: Bouncing and spinning of amorphous Lennard-Jones nanoparticles under oblique collisions
(a) Sketch of the collision of NP1 and NP2 in the center-of-mass frame. The initial collision velocity of NP1 is \(\varvec{v}\), its post-collision velocity is \(\varvec{v}'\); they make an angle \(\theta\). Because of symmetry, NP2 has – apart from the sign – the same pre- and post-collision velocities and deflection angle as NP1. (b) Sketch of the collision kinematics at the moment where the two NPs touch at point C. C is also the – unmoving – center of mass of the system. The blue circles denote the NPs, R is the NP radius, B the impact parameter, and the angle \(\phi\) is given by Eq. (3).
