Effect of initial disturbance amplitude in gravity affected jet break-up

The initial disturbance amplitude has an effect on stretching jets that is not observed for capillary jet instability where gravitational acceleration is not significant. For inviscid and viscous fluids, gravity diminishes the effect that the initial amplitude has on jet length and its ability to prevent satellite formation. In stretching jets, not only the dimensionless frequency of the disturbance but also its initial amplitude must be known to properly study their satellite forming nature. Indirect methods of relating the applied disturbance energy to an initial velocity perturbation are not simple when the gravity parameter GG is changing. When G≠0G≠0, the optimum disturbance frequency ΩoptΩopt and the initial disturbance amplitude are related, with Ωopt∝f(G)×ln(1/εv)Ωopt∝f(G)×ln(1/εv). Results from numerical simulations and experiments are presented here.