Small-scale flows inside cavities

streaming_mov

Acoustic streaming flows inside 2ml silicone elastomere cavities; top view (left: 3.5 kHz / right: 18.4 kHz). Particle seeding: oil droplets

Streaming_streamlines

Streamline of acoustic streaming inside 2ml elastic cavities; top view (left: 3.5 kHz / right: 18.4 kHz)

bubble_mov

Forced recirculating flows inside a 4ml soap bubble under local heating at a single point on bubble surfac; top view. Particle seeding: smoke particles – click for animation

bubble__streamlines

Forced recirculating flows inside a 4ml soap bubble under local heating at a single point on bubble surfac; top view. Particle seeding: smoke particles

bubpop_mov

Forced recirculating flow inside a 4ml drop under local heating at two points on bubble surface. Bubble pops when heating is too hot – click for animation

Recirc_cavity

Streamline visualization of flow around and inside a cavity (false colors). Experiment conducted in a tow-tank with silicone oil (Reynolds number = 0.02).