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!

Homework Help: Velocity and pipe diameter

  1. Sep 17, 2009 #1
    Hello there,

    Im trying to figure this assignment question and I have hit hurdle. Can someone please help with figuring out what the velocity and pipe diameter will be??

    In a plant 20m3(cubic)/h of water at 20 degrees C is to flow via gravity from a storage tank to another one. the difference in elevation is 15m and total pipe length is 50m.

    I thought it would be 9.81 m/s because of gravity but that seems too fast.
    Can someone please help.

    Thanks in advance!
  2. jcsd
  3. Sep 18, 2009 #2
    i would give bernoulli's equation a try

    [tex]p + \frac{1}{2} \rho v^2 + \rho g h = \rm{const} [/tex]​


    [tex] \dot V = \frac{v}{A} [/tex]​
  4. Sep 18, 2009 #3
    Just to be technical on this.

    Bernoulli's equation only works well if the viscosity of the fluid can be neglected.

    Follow saunderson's post. I just wanted to throw the viscosity bit in.

    Last edited: Sep 18, 2009
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook