Dynamic Behavior and Two Phase Flow Pattern of Falling Droplet Using Lattice Boltzmann Numerical Method

In this study, falling droplet in the 2-D channel is numerically studied using the lattice Boltzmann method with the pseudopotential model. Quantitative information about the flow variables such as behavior of droplet, stream line and wake of behind of droplet for two cases is investigated: a) of falling of single droplet and b) falling of two droplets in tandem arrangement. To validate the current numerical simulation, the result are compared with previous literature. The comparison shows a good agreement. The results show that wake region at the back of the droplet increases by increasing Eovos number while a reverse trend can be seen by increasing of Ohnesorge number. In the case of falling of two droplets in tandem arrangement, the droplets collide and soon after form a larger droplet with twice the diameter as the initial droplet. Eventually, the droplet breaks up due to high inertia of formed droplet.