On the physics of fizzing: How bubble bursting controls droplets ejection

摘要

Bubbles at a free surface surface usually burst in ejecting myriads ofdroplets. Focusing on the bubble bursting jet, prelude for these aerosols, wepropose a simple scaling for the jet velocity and we unravel experimentally theintricate roles of bubble shape, capillary waves, gravity and liquidproperties. We demonstrate that droplets ejection unexpectedly changes withliquid properties. In particular, using damping action of viscosity,self-similar collapse can be sheltered from capillary ripples and continuecloser to the singular limit, therefore producing faster and smallerdroplets.These results pave the road to the control of the bursting bubbleaerosols.