Fluid dynamics and pressure type question.

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SUMMARY

This discussion focuses on the feasibility of using a 55-gallon drum to collect rainwater and subsequently using a hose to transport that water back up to a roof deck for irrigation. The key takeaway is that calculating the pressure in pascals, based on the weight density and height of the water, is essential to determine if the water can be effectively pushed through the hose. It is established that geometry, specifically the relationship between pressure and hose diameter, does not influence the ability to achieve this task.

PREREQUISITES
  • Understanding of fluid dynamics principles
  • Knowledge of pressure calculations in pascals
  • Familiarity with weight density of water
  • Basic geometry related to fluid flow
NEXT STEPS
  • Research fluid dynamics equations related to pressure and height
  • Explore the impact of hose diameter on fluid flow rates
  • Learn about green roof irrigation systems
  • Investigate alternative methods for elevating water for irrigation
USEFUL FOR

Engineers, landscape architects, and anyone interested in sustainable irrigation solutions for green roofs will benefit from this discussion.

Gersty
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Let's say I want to install a 55 gallon drum on the ground to collect rain water as it runs off the roof. What if for some strange reason I wanted to run a hose from a spigot in the bottom of the drum back up to water the plants on the roof deck (I'm looking into green roofs). Could we just calculae the pressure in pascals and then determine if that would be enough force to push a hosefull of water back up to the roof?
 
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Pressure is just the weight density times height. Geometry - such as concentrating a large pressure into a small hose - plays no role whatsoever, so what you are describing can't be done.
 

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