67th Annual Meeting of the APS Division of Fluid Dynamics (November 23, 2014 — November 25, 2014)

V0052: Why beer does not spill: foam damps sloshing

Authors

• Alban Sauret, Princeton University
• Francois Boulogne, Princeton University
• Jean Cappello, Princeton University
• Emilie Dressaire, NYU Polytechnic School of Engineering
• Howard Stone, Princeton University

DOI: https://doi.org/10.1103/APS.DFD.2014.GFM.V0052

We have all experienced sloshing, for example when waIking with a cup of coffee. Some beverages, such as beer, do not slosh as readily. This observation suggests that the addition of foam on top of the liquid may play a role in the sloshing dynamics. Using a model system, we show that the motion of the foam along the walls of the container damps sloshing through viscous dissipation. We conclude that it is much easier to carry beer than coffee.