Do I Need to Apply Atmospheric Pressure in Tank Analysis?

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Discussion Overview

The discussion revolves around the necessity of applying atmospheric pressure in the analysis of a water tank's structural integrity. Participants explore the implications of hydrostatic pressure versus atmospheric pressure in the context of a plastic water tank that is open to the atmosphere.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant, Jmex, questions whether atmospheric pressure needs to be considered in the analysis of a water tank filled with water.
  • Another participant asks for clarification on the external conditions surrounding the tank, specifically whether it is exposed to air at atmospheric pressure or other pressures.
  • Jmex clarifies that the tank is open to the atmosphere and that the water is not under any additional pressure.
  • Some participants suggest that since the tank is open to the atmosphere, the initial analysis considering only hydrostatic pressure may be sufficient.
  • There is a repeated inquiry about the necessity of applying atmospheric pressure, indicating some uncertainty about the analysis method.
  • A later reply confirms that atmospheric pressure does not need to be applied in this case, suggesting a consensus on this point.

Areas of Agreement / Disagreement

While there is some agreement that atmospheric pressure may not need to be applied in this specific scenario, there remains a degree of uncertainty regarding the implications of including it in the analysis.

Contextual Notes

Participants do not fully resolve the implications of applying atmospheric pressure versus relying solely on hydrostatic pressure, leaving some assumptions and conditions unaddressed.

jmex
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Hello all,

I am trying to understand the inputs here. Let's suppose I have a water tank at home which is made of plastic. It is filled with water. So I am confused with the inputs.
At first when I gave only hydrostatic pressure, the tank was safe. But when I added atmospheric pressure by applying pressure condition on internal surface by 14.59 psi, it was failing. So do I have to apply atmospheric condition? Is it true?

Thanks,
Jmex
 
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What do you have outside the tank? Air at atmospheric pressure? Water under pressure? Something else?
 
Tank is open to atmosphere. Water is not under any other pressure except open to atmosphere.
 
jmex said:
Tank is open to atmosphere. Water is not under any other pressure except open to atmosphere.
Then your first answer was correct.
 
that means i do not have to apply atmospheric pressure?
 
jmex said:
that means i do not have to apply atmospheric pressure?
Correct.
 
ok. thanks.
 

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