Numerical Study on Primary Breakup of Disturbed Liquid Jet Sprays Using a VOF Model and LES Method

In this study, the primary breakup of a high-speed diesel jet is investigated using CFD methodology that combines an LES model with VOF technique for free surface capture. Inner-nozzle turbulence and cavitation are simplified as sinusoidal radial velocity given amplitude frequency. The ligament droplet formation process captured, liquid disturbed by velocity, umbrella-shaped crests created. Meanwhile, ligaments formed from edges because shear stress tension. We investigate effect on characteristics wave structure different disturbance frequencies amplitudes. variation in frequency facilitates variety structures, such waves, upstream/downstream-directed bells, chains. Increasing reduces growth rate waves jet. With increase amplitude, evidently increases. Furthermore, increase, thickness Weber number sheet decrease, causes diameter to become small. Finally, time investigated, scale decreases increases, which indicates promotes atomization