My Math Forum Requesting Help with Water Flow rate problem

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 April 25th, 2017, 10:41 AM #1 Newbie   Joined: Apr 2017 From: UK Posts: 2 Thanks: 0 Requesting Help with Water Flow rate problem Hi all I am trying to calculate the flow rate of water through a 6mm pipe as i am working on a water wheel project with some friends the information i have to offer is this -i have a 25L water container - Height: 370mm - Width: 270mm - Length: 350mm - there is a 6mm pipe attached 90º to the base and flush with it -the top of the container is open to the atmosphere i am hoping someone here can help me learn how to work this out thanks for any help offered RedCrow
 April 25th, 2017, 10:50 AM #2 Senior Member   Joined: Dec 2015 From: Earth Posts: 147 Thanks: 20 as long as $\displaystyle \rho$ acts upon it , then $\displaystyle \;$ $\displaystyle p=\rho_a -\rho$ Thanks from RedCrowsgt
 April 25th, 2017, 11:08 AM #3 Newbie   Joined: Apr 2017 From: UK Posts: 2 Thanks: 0 sorry but we have tried to work out how that will help i a little unsure is there any chance you could explain with a touch of detail or illumination on what each factor in that equation is ?
 April 26th, 2017, 01:29 AM #4 Senior Member   Joined: Apr 2014 From: Glasgow Posts: 1,987 Thanks: 646 Math Focus: Physics, mathematical modelling, numerical and computational solutions You need Bernoulli's equation. See here: https://en.wikipedia.org/wiki/Bernoulli%27s_principle
 April 29th, 2017, 12:10 AM #5 Newbie   Joined: Apr 2017 From: Japan Posts: 1 Thanks: 0 you'll need to use Bernoulli equation to calculate the flow, you can simply use v = sqrt(2*g*H) this one will give you the flow velocity at the connection for given water head "H", however, this will be time dependent since you're using a tank of limited capacity. it will also be inaccurate if you tried to verify your calculations by measuring the flow at the end of the pipe, in this case you'll need the pipe length and a friction formula (darcy-weisbach for example).

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