- #1
Chen
- 977
- 1
Hello,
In this article:
http://www.deas.harvard.edu/softmat/downloads/2005-13.pdf (PDF, 175kb)
The authors give a simplifed explanation of why a bubble is attracted to the walls at the surface of the liquid. I can definitely understand this explanation, but my question is why do bubbles get attracted to the walls even below the surface? If you fill a glass with some coke (or any other fizzy drink) you will notice that a great deal of bubbles are not floating to the surface of the drink, but instead they are firmly attached to the walls of the cup. Furthermore, you can also notice bubbles attached to the bottom end of the cup! This is very counter intuitive, at least for me.
So I would like to know how you can explain the phenomenon of air bubbles that get attached to the submerged part of the walls of the cup, and even to its very bottom.
Thanks,
Chen
In this article:
http://www.deas.harvard.edu/softmat/downloads/2005-13.pdf (PDF, 175kb)
The authors give a simplifed explanation of why a bubble is attracted to the walls at the surface of the liquid. I can definitely understand this explanation, but my question is why do bubbles get attracted to the walls even below the surface? If you fill a glass with some coke (or any other fizzy drink) you will notice that a great deal of bubbles are not floating to the surface of the drink, but instead they are firmly attached to the walls of the cup. Furthermore, you can also notice bubbles attached to the bottom end of the cup! This is very counter intuitive, at least for me.
So I would like to know how you can explain the phenomenon of air bubbles that get attached to the submerged part of the walls of the cup, and even to its very bottom.
Thanks,
Chen