Simulation of liquid jet atomization coupled with forced perturbation

In this paper, the physical coupling processes between atomization and forced perturbation are considered. The effect of perturbation frequency and amplitude has been numerically investigated via a tree-based adaptive algorithm incorporating a time-dependent incompressible two-phase Navier-Stokes solver to simulate the atomization process. An open source code Gerris is validated using theoretical, numerical, and experimental results to demonstrate the generic capability and accuracy regarding atomization both in the low- and high-speed regimes. For a low speed jet, the breakup length and droplet diameter are examined to study the effect on breakup behaviour. For the high speed case, the frequency response of the jet is essentially classified into three distinct regimes. The jet shows a strong response for the low frequency and a correspondingly weak response for the high frequency. Perturbation amplitude also affects the atomization significantly.