Walking with coffee: Why does it spill?
source link: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.85.046117
Go to the source link to view the article. You can view the picture content, updated content and better typesetting reading experience. If the link is broken, please click the button below to view the snapshot at that time.
Abstract
In our busy lives, almost all of us have to walk with a cup of coffee. While often we spill the drink, this familiar phenomenon has never been explored systematically. Here we report on the results of an experimental study of the conditions under which coffee spills for various walking speeds and initial liquid levels in the cup. These observations are analyzed from the dynamical systems and fluid mechanics viewpoints as well as with the help of a model developed here. Particularities of the common cup sizes, the coffee properties, and the biomechanics of walking proved to be responsible for the spilling phenomenon. The studied problem represents an example of the interplay between the complex motion of a cup, due to the biomechanics of a walking individual, and the low-viscosity-liquid dynamics in it.
- Received 23 December 2011
DOI:https://doi.org/10.1103/PhysRevE.85.046117
©2012 American Physical Society
Recommend
About Joyk
Aggregate valuable and interesting links.
Joyk means Joy of geeK