1. Limited time only! Sign up for a free 30min personal 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!

Fluid/Air Dynamics question

  1. Mar 24, 2010 #1
    We are trying to make an inflator for the double roof on a greenhouse using 4" pvc and a vane on the back to keep it pointed into the wind. There is a lot of disagreement on whether a funnel on the intake end will make it work any better than just the 4" pipe facing into the wind.

    Attached Files:

  2. jcsd
  3. Mar 24, 2010 #2


    User Avatar

    Staff: Mentor

    Theoretically, a funnel shouldn't help because pressure is pressure and you can't multiply it, but in reality the system isn't closed and you'll need airflow through it to keep the greenhouse inflated. I think it may be a losing battle, though.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook