Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Interesting phenomenen

  1. Apr 7, 2008 #1
    The other day I was working in the lab and observed a very interesting fluid dynamic thing in a beaker:

    I was cooking acetone on a hot plate to clean a sample, then I see little bubbles on the surface bouncing around. The strange thing is that those bubbles act EXACTLY like a ball on a frictionless surface! They never decelerate (or accelerate for that matter), just travel on a straight line, when ever they hit a obstacle (beaker wall/ sample) they will be bounced back like a tennis ball hitting a wall.

    That bubbles don't slow down due to friction really bug me. I guess the evaporation provides energy for the motion in a reinforced kind of way to maintain the pattern. Maybe it count as a soliton? And there should be no convection when this happens.

    I tried to repeat this with 2-propenal, nothing like that happens. With Aceton it works every time. Maybe Acetone has the exact right viscosity/evaporation rate...?

    So can anyone explain the detailed mechanism? Or it's been done before?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted