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A question about water flow rate 
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#1
Sep2310, 06:00 PM

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Hi all, I'm doing a experiment at home I'm trying to know how the flow rate on the water height that tossed from a nozzle with 3mm of diameter.
By an other word if there is a relationship between flow and the height please some one explain it to me. Also I wana to know if the head pressure if the water height that tossed from a nozzle. thanks in advance. 


#2
Sep2310, 08:29 PM

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The height the water will go to is a function of the pressure at the exit only. The pressure determines the velocity, which determines the height.



#3
Sep2310, 09:47 PM

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alwindawee: Perhaps try thread 368030, posts 4 and 6.



#4
Sep2410, 02:29 AM

P: 5

A question about water flow rate
thanks, russ.
thank you too nvn, I have read the post but did not reach what I need, I think if I explain the problem a little more you could help so this what the problem. I wana the water go for the desired height and want to know how much flow rate and how much head (Q and H) needed so I can choose the right pump. And this is the way I imagined the matter: I applied this formula "s=s0+(v0*t)+(0.5*a*t^2)" and solved for v0 supposing that: s0=0 ............. at the nozzle. t=1s ............. I suppose that water reach the desired height in 1s. a=9.81 .......... the acceleration due to gravity. finding v0 which is the initial velocity the water tossed with from the nozzle. Then applying the formula "Flow Rate = 0.25 * pi * (pipe diameter)^2 * velocity" solving for flow rate I'll find the needed flow rate so I can select the pump. and for the Head Pressure (H) as I know we can determine the needed H approximately by measuring the distance from the spot that the pump stands to the nozzles tossing hole. this is the way I calculate things, if it's wrong please help me and by the way I'm a electronic engineering student but like mechanics. thanks for you response again. 


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