3D forced bounce simulations, in which bouncing motion was driven using a time-dependent vertical gravitational acceleration of the form |$g_{\text{eff,z}} = -\Omega ^2 z (1 + a \cos {\omega t})$|⁠, where |$a$| is the dimensionless forcing amplitude, and |$\omega$| is the forcing frequency (in units of the local orbital angular frequency |$\Omega$|⁠). Note that |$\Delta T$| is the interval (in orbits) between bounces measured directly from the simulation – it should correspond to the inverse of the forcing frequency. All simulations were run for 100–200 orbits, at fixed Reynolds number of |$\text{Re}=4687$|⁠, and used reflective BCs in the vertical direction.