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

I A1v1=a2v2? pressure and velocity are inversely proportional?

  1. May 16, 2018 #1
    If Bernoulli's equation P + 1/2ρv2 + ρgh = constant, implying that pressure decreases as velocity increases, and the Venturi effect states that a1v1 = a2v, what resolves this apparent contradiction? The velocity slows as the cross sectional area increases, but a narrower pipe would have greater pressure?
  2. jcsd
  3. May 16, 2018 #2
    I don't see any contradiction.
  4. May 16, 2018 #3


    Staff: Mentor

    There is no contradiction to resolve.

    You have this backwards. A larger pipe has greater pressure. That is why brain aneurysms are dangerous
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?