Dynamics of a Shocked Bubble-Encapsulated Droplet
Simultaneous bubble and droplet visualization with the colored pressure field and the grayscale density gradient magnitude, respectively. Pressures are indicated in MPa. Times in brackets are in µs. t = 0 µs corresponds to the first bubble-shock interaction.
Gas-encapsulated droplets (i.e., droplet trapped inside a bubble) have recently been promoted as an effective technique for fluid transport. We recently proposed shock waves as an instant release mechanism for the encapsulated fluid, which subsequently discharges into the surroundings. The interaction of the shock wave with gas-encapsulated droplets results in a water-hammer shock, which triggers a sheet cascade of transverse jets. This latter drives the droplet fragmentation and so the payload dissemination. More details can be found external page here.