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Flow rate calculation from pressurised container

Flow rate calculation from pressurised container

Flow rate calculation from pressurised container

(OP)
Hello

I am currently designing a device to fill gearboxes with hydraulic fluid using air pressure. The idea is to pressurise a container with say 9 litres of fluid inside to cause the fluid to flow out of a hose and into the gearbox.

My question is how can I calculate what pressure will need to be in the reservoir to get a flow rate of 2.5 L/s. Hose ID will be 10mm and approx 2m long.

I have attached a quick sketch of the layout.

 

"Two hands working can do more than a thousand clasped in prayer"

RE: Flow rate calculation from pressurised container

You want to push 9m3 per hour through a hose from a 9L container?
What Viscosity?
Give more and exact data please.
 

RE: Flow rate calculation from pressurised container

(OP)
Apologies I meant 2.5 litres a minute.

The viscosity will be approx 38.9 cST 40°C.

However the figures are not important as I require the method (equation) in which to find the answer, not the answer itself.

"Two hands working can do more than a thousand clasped in prayer"

RE: Flow rate calculation from pressurised container

"However the figures are not important as I require the method (equation) in which to find the answer, not the answer itself.

Poiseuille's equation for laminar flow (NRe < 2000).

Good luck,
Latexman

RE: Flow rate calculation from pressurised container

That equation is derived from basic principles, just use consistent units.  Maybe, it will simplify (cancel out) to the units you desire for pressure drop.

Good luck,
Latexman

RE: Flow rate calculation from pressurised container

(OP)
Got it. Thanks for the help guys.

"Two hands working can do more than a thousand clasped in prayer"

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