Pipe Flow Q: Frictional Head Loss in Tank?

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SUMMARY

The discussion centers on the frictional head loss in a tank during fluid flow, specifically addressing the treatment of the problem as a pipe flow scenario. The participant questions the validity of neglecting frictional head loss (hf) due to the tank walls, arguing that the fluid's velocity, resulting from the reservoir's decreasing depth, is minimal. The consensus is that the negligible velocity justifies ignoring frictional losses in this context, despite the initial confusion regarding the classification of the problem as pipe flow.

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  • Understanding of fluid dynamics principles
  • Familiarity with pipe flow equations
  • Knowledge of frictional head loss concepts
  • Basic grasp of reservoir behavior in fluid systems
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  • Study the Darcy-Weisbach equation for frictional head loss in pipes
  • Learn about the Reynolds number and its impact on flow regimes
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theBEAST
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Homework Statement


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This is in the pipe flow section and the solution treats this question like a pipe. Here is the solution:
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As you can see I circled the pipe flow equations in red. If this is the case shouldn't there be frictional head loss, hf, caused by the walls of the tank? I don't understand there solution.
 
Physics news on Phys.org
The velocity of the fluid caused by the decrease in depth as the reservoir empties is so small that any frictional head loss can be neglected.
 
SteamKing said:
The velocity of the fluid caused by the decrease in depth as the reservoir empties is so small that any frictional head loss can be neglected.

How is the question even a pipe though :O
 

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