Discussion Overview
The discussion revolves around the dynamics of a pressurized tank emptying through a hole, specifically focusing on developing a pressure vs. time curve as the tank's pressure decreases from 100 psi to atmospheric pressure. The scope includes fluid dynamics principles and the application of relevant engineering formulas.
Discussion Character
- Exploratory
- Technical explanation
- Mathematical reasoning
Main Points Raised
- One participant expresses difficulty in applying fluid dynamics to model the emptying of a 10L tank of compressed air at 100 psi through a hole, seeking a general curve for pressure vs. time.
- Another participant suggests consulting engineering formulas from valve manufacturers and pneumatic handbooks, indicating the need for different equations based on pressure regimes (sonic vs. subsonic).
- A participant points out that 100 psi relative translates to 114 psi absolute, which is significantly above atmospheric pressure, and inquires about methods for estimating the flow rate during the tank's emptying process.
- Further advice is given to explore the LOHMS concept for calculating flow rates based on orifice size and pressure differences.
Areas of Agreement / Disagreement
Participants do not reach a consensus on a specific method or formula for modeling the pressure drop over time, and multiple approaches and considerations are presented without resolution.
Contextual Notes
Participants mention the need to consider different flow regimes based on pressure levels, indicating that assumptions about flow characteristics may affect the modeling approach.