1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Strange air flow problem

  1. Apr 13, 2009 #1
    if you use your mouth to blow air through a pipe (an A4 page rolled into a pipe for simplicity) with your mouth against the pipe, the outlet flow is much less compared to when you blow through the pipe with your mouth away from it. In terms of fluid mechanics, why does this happen?
     
  2. jcsd
  3. Apr 16, 2009 #2

    minger

    User Avatar
    Science Advisor

    Because if you have you lips against the paper, then the only air that can come out of the paper. Basically, in order for air to go out, air must come in. If your lips are against the paper, you're stopping air from coming in.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Strange air flow problem
  1. Air Flow Problem (Replies: 4)

Loading...