Mobile-surface bubbles and droplets coalesce faster but bounce stronger
Ivan U Vakarelski, Fan Yang, Yuan Si Tian, Er Qiang Li, Derek YC Chan, Sigurdur T Thoroddsen
Science Advances | AMER ASSOC ADVANCEMENT SCIENCE | Published : 2019
Enhancing the hydrodynamic interfacial mobility of bubbles and droplets in multiphase systems is expected to reduce the characteristic coalescence times and thereby affect the stability of gas or liquid emulsions that are of wide industrial and biological importance. However, by comparing the controlled collision of bubbles or water droplets with mobile or immobile liquid interfaces, in a pure fluorocarbon liquid, we demonstrate that collisions involving mobile surfaces result in a significantly stronger series of rebounds before the rapid coalescence event. The stronger rebound is explained by the lower viscous dissipation during collisions involving mobile surfaces. We present direct numer..View full abstract
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Awarded by National Natural Science Foundation of China
Awarded by Australian Research Council
The experimental and computational work was supported by the King Abdullah University of Science and Technology. E.Q.L. was supported by the National Natural Science Foundation of China grants nos. 11772327, 11972339, and 11621202. D.Y.C.C. was supported by the Australian Research Council through a Discovery Project grant no. DP170100376.