Dynamical simulation of bubble interactions

The coupled volume of fluid and level set method was applied to simulate dynamic characteristics of double bubbles; the bubble behavior was studied in five conditions. According to numerical simulation, it can be seen that: the different arrangement, distance and deformation would produce different effects on bubbles. The interactions decreased with increase in bubble distance when horizontal dispersed, and it can be neglected when bubble distance was 1.5 times of average diameter. If the bottom bubble was in wake of the upper bubble, the below one would accelerate until the merger occurs when vertical dispersed; It was observed that bubble deformation led to increased bubble interactions and as a result, the fluctuation of CL was increased. The time-averaged CL of all the bubbles was found to be very small and then stabilized as compared with the characteristic CL obtained from the single bubble rise.