| Wed August 10th 2016 16:00 – 17:00 ZH286 | Seminar | Diffusively growing gas-bubble coalescence Tom Maddalena |
Details:The coalescence of two CO2 microbubbles in water has been followed at a frame rate of 60,000 fps. Starting from a diffusive growth of the bubbles, we study in detail the evolution of the collapsing process and compare it to previous research done on bubbles and drops. First of all, we compare the formation of a neck between both bubbles with a theoretical model. Afterwards, we characterise the propagating deformation along the surface, measuring its evolution. We quantify the time scales of every phenomenon, concluding that the whole coalescence is only driven by capillarity, without remarkable infuence of gravity or viscosity. | ||
