This study employed the method of coupled level set and volume of fluid (CLSVOF) to simulate simultaneous impact of multiple droplets on a liquid film three-dimensionally

and focused on the splashing process with the implement of Gaussian distribution to generate perturbation on liquid phase. The formation and break-up mechanisms of the central sheet and the formation mechanism of the column jet were revealed through analyzing pressure and velocity distributions after impingement. The effects of impact Weber number

film thickness and droplet interval were discussed. It is shown that the splashing characteristics can be well predicted with the use of Gaussian distribution on liquid phase. After the neck-jet or crown liquid sheet contacting with each other

a great pressure gradient is produced in the contact region

which leads to production of the upward-moving central liquid sheet with the conjunct motivation of fluid kinematic discontinuity and breaks up under the effects of fluid instability and gas vortex. The central sheet height increases with increasing Weber number and film thickness

or with decreasing droplet interval.