Simulations of bubble-wall collision and bouncing

POSTER

Abstract

The collision of a rising bubble with a hydrophilic upper wall is studied numerically using an axisymmetric phase-field model. Prior experiments show bubble bouncing or adhesion depending on its incoming velocity. Using experimental parameters, our computation reproduces these different behaviors, including bubble breakup, arrest, and rebound. In particular, dimples are observed on both the fore and aft sides. We further investigate the scaling of the coefficient of restitution and the critical condition delineating arrest from rebound. The latter is plotted as a phase diagram in terms of the Ohnesorge and Weber numbers.

Authors

  • Sohrab Towfighi

    Department of Chemical and Biological Engineering, University of British Columbia

  • Hadi Mehrabian

    Department of Chemical and Biological Engineering, University of British Columbia

  • R. Zenit

    Universidad Nacional Autonoma de Mexico, National Aut\'onomous University of M\'exico, Materials Research Institute, National Autonomous University of Mexico

  • James J. Feng

    Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, B.C., Canada V6T 1Z3, University of British Columbia, Department of Chemical and Biological Engineering, University of British Columbia, Chemical \& Biological Engineering Department - UBC