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Old Jun 17th 2017, 03:53 PM   #1
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Join Date: Jun 2017
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How to calculate the conditions for water suction using pressure difference.

I want to make a container with a low pressure inside it to pull water from a reservoir upward using a pipe,
How do I decide on the height, the required pressure difference and the relevant flow rate?
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Old Jun 17th 2017, 11:41 PM   #2
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So ...you have a sealed container connected to a reservoir. The reservoir is at a lower height . A pipe exits the bottom of the container and connects to the reservoir . An air pipe exits the top of the container , you want to pump out the air and suck water into the container ...

One atmosphere of air pressure is equivalent to 10 meters of water height , if the reservoir is more than 10 meters below the container ,you can't do it ... up to 10 meters lower you could , with a good vacuum pump.

Rate of flow is dependent on pipe diameter and length.

A hydraulic ramp pump might be a better idea .Powered by the pressure in the reservoir it can raise some water to a greater height , at the cost of transferring a greater quantity to lower than the reservoir height.
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  Physics Help Forum > High School and Pre-University Physics Help > Thermodynamics and Fluid Mechanics

calculate, conditions, difference, fluid mechanics, pressure, pressure difference, pump, suction, vacuum, water

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