How to calculate water from storage tank to small tank?

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Discussion Overview

The discussion revolves around calculating the flow rate and speed of water from a storage tank through connected pipes, specifically focusing on a scenario involving multiple tanks and a shared drain pipe. The scope includes theoretical applications of fluid dynamics principles.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about calculating the speed and volume of water flow from a 10,000L tank using a 2-inch pipe.
  • Another participant suggests using Torricelli's formula for calculating the velocity of water flow, followed by the flow rate equation Q=Av, where A is the cross-sectional area of the pipe.
  • A follow-up question is posed regarding the application of Torricelli's formula when multiple tanks are involved, specifically if three tanks connected to a 6-inch main drain pipe would affect the flow calculations.
  • One participant proposes that the flows from the three tanks would need to be summed for the 6-inch drain pipe, although they express uncertainty about their conclusion due to a lack of recent experience with fluid dynamics.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the implications of multiple tanks on flow calculations, and there is uncertainty regarding the correct approach to summing flows from different sources.

Contextual Notes

Limitations include potential dependencies on assumptions about flow conditions, pipe configurations, and the effects of gravity and pressure on flow rates, which are not fully explored in the discussion.

Who May Find This Useful

Individuals interested in fluid dynamics, engineering applications related to water flow, or those working on practical plumbing or tank systems may find this discussion relevant.

karloon
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I have a 10,000L water tank (size 3.5m Dia x 1.0 m H) connected to 2 inch pipe (bottom of the tank). How do I calculate the speed/volume of the water flow out from the tank?
 
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You could use Torcelli's formula (from conservation of energy) to get v=√(2gh)

and then if you wanted the flow rate you'd use Q=Av where A = cross-sectional area of the pipe.
 
Thank You rock.freak667,

I checked the Torcelli's formula and it helps. However, using this formula. Can I calculate the water flow if it involve more that 1 tank?

For example:
I have "THREE" 10,000L water tank (size 3.5m Dia x 1.0 m H), each connected to 2 inch pipe (bottom of the tank) and share the same main drain pipe (6 inch). All three tank will flow from the 2" pipe to 6" main drain pipe and finally enter a storage tank. Will the flow/speed still be the same and I just change the Q=Av (A- from 2" pipe to 6" pipe) for the water flow?

TQ in advance.
 
If you want the water flow for the 6" drain pipe then you'd have to add the flows together I believe.

However I could be wrong as I've not done fluid related problems in for a few years.
 

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