Abstract
We study experimentally the dynamics of a liquid drop containing an air bubble falling onto a pool of the same liquid. We first develop a drop-on-demand setup capable of forming repeatable compound drops without any surfactant. Then, we investigate the impact dynamics above and below the pool surface combining two high-speed cameras. We identify three different regimes as the impact height increases. At low impact velocities, the bubble is engulfed into the pool. Above a critical impact velocity, the bubble bursts during impact. For higher falling heights, the bubble ruptures before reaching the pool due to air drag decelerating the compound drop.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have