Leaky Tank Differential Eqn Problem

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SUMMARY

The discussion focuses on the leaky tank differential equation problem, specifically addressing the conditions under which a tank overflows. Participants emphasize the significance of the relationship between the inflow rate (r1) and the outflow rate (r0). When r1 equals r0, the system reaches a steady state, indicating that the water level will not rise further, thus preventing overflow. The maximum outflow rate of tank 1 must be equal to or greater than r0 to avoid spillage, highlighting the critical balance required for system stability.

PREREQUISITES
  • Understanding of differential equations, particularly in fluid dynamics.
  • Familiarity with steady-state analysis in systems.
  • Knowledge of flow rates and their impact on system behavior.
  • Basic principles of tank overflow dynamics.
NEXT STEPS
  • Study the principles of fluid dynamics in relation to differential equations.
  • Learn about steady-state conditions in dynamic systems.
  • Explore the mathematical modeling of tank overflow scenarios.
  • Investigate the implications of varying inflow and outflow rates on system stability.
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Students and professionals in engineering, particularly those focusing on fluid dynamics, system modeling, and differential equations. This discussion is beneficial for anyone tackling problems related to tank overflow and flow rate analysis.

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Homework Statement


http://ocw.mit.edu/courses/electric...s-fall-2011/assignments/MIT6_003F11_sol01.pdf

http://i.imgur.com/8qj5cWE.png

#6 Part B
upload_2015-6-8_4-36-6.png


Homework Equations


None[/B]

The Attempt at a Solution


Don't understand why we care about when r1=r0

The tank will overflow when the height of the tank is greater than 1. Why care about r1=r0? What is our motivation for think about the r1=r0 case? That's steady state sure. But they are asking about overflow which I thought just depends on water level

upload_2015-6-8_4-36-6.png
 

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Once r1=r0 the water level in the top tank will cease to rise farther. If that tank has not overflowed by the stage r1 attains r0, then that tank is never going to overflow.

Each tank has two outlets: the normal outlet at its base, and the overflow being its top rim.
 
LongApple said:
Don't understand why we care about when r1=r0

The tank will overflow when the height of the tank is greater than 1. Why care about r1=r0? What is our motivation for think about the r1=r0 case? That's steady state sure. But they are asking about overflow which I thought just depends on water level

View attachment 84595
Max. outflow rate of tank 1 without spilling is r1(h1max). This obviously must be >= r0.
If r0 > r1(h1max) then tank 1 will spill since more water has to flow out of tank 1 than its hole can accommodate.

NOTE: "r1(h1max)" means "r1 of h1max, not r1 times h1max.
 

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