Calculating Flow Dynamics
Calculating Flow Dynamics
(OP)
Trying to determine flow rate from one tank to another via a 3" SCH 80 PVC pipe. The tanks are exact same size and the 3" pipe is an equalization pipe between the two tanks. I would like to determine the flow from one tank to the other with a 1" solution differential.
Thanks
Mike
Thanks
Mike





RE: Calculating Flow Dynamics
There are many simple charts showing this. 1" differential is very low. Any length will result in very low flow
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RE: Calculating Flow Dynamics
I recommend you refer to Crane Technical Paper No. 410. If you don't have it, buy it. It'll be the best $60 you ever spent. Crane TP410
Good luck,
Latexman
To a ChE, the glass is always full - 1/2 air and 1/2 water.
RE: Calculating Flow Dynamics
Perhaps you could point me to a chart. I would appreciate it.
Thanks,
Mike
RE: Calculating Flow Dynamics
The formula is h = KV2/(2g), or V=√(2hg/K)
h is the head, which you would have to express as 1/12 ft if the velocity is in ft/s
V is velocity in ft/s
g is acceleration of gravity = 32.2 ft/s2
If your pipe is welded flush to the tank wall then the entrance loss is K=0.5 and for the exit loss K=1.0, giving a total K of 1.5
This makes V = √(2 x 32.2 / (12 x 1.5)) = 1.89 ft/s
which is 38.8 USgpm in a 2.9" ID pipe. I would take off 15% for friction and safety and assume that the flow is 33 USgpm
Katmar Software - AioFlo Pipe Hydraulics
http://katmarsoftware.com
"An undefined problem has an infinite number of solutions"
RE: Calculating Flow Dynamics
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Calculating Flow Dynamics