Calculating Water Flow Time in a Tube | Gravity-Powered Flow Question

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SUMMARY

This discussion focuses on calculating the time it takes for a volume of water to flow through a tube due to gravity, specifically under conditions of laminar flow while neglecting viscosity. Key factors include the diameter of the tube and the height difference between the inflow and outflow ends, which are essential for applying the conservation of energy principle. The calculations rely on fluid dynamics principles to derive the flow time accurately.

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  • Understanding of fluid dynamics principles
  • Knowledge of laminar flow characteristics
  • Familiarity with conservation of energy in fluid systems
  • Basic mathematics for calculating flow rates
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  • Research the Hagen-Poiseuille equation for laminar flow in tubes
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maxtor101
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Hi all!

If I had a tube with diameter x cm, filled with water, how would I calculate the time it takes for a volume V of the water to pass a point in the tube, flowing completely due to gravity.

Thanks
 
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Assuming laminar flow and neglecting viscosity? You also need the height of the inflow end above the outflow end - then it's conservation of energy.
 

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