What Causes Pressure Changes Along a Pipe?

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    Pipe Pressure
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Homework Help Overview

The discussion revolves around the pressure changes along the inner and outer walls of a pipe, particularly in the context of fluid dynamics. Participants explore the implications of flow speed and pressure distribution in relation to pipe bends.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants examine the relationship between the length of the outer wall and flow speed, questioning whether a longer path results in slower flow and higher pressure. Others introduce concepts of centrifugal forces and pressure profiles, suggesting that the outer wall may actually experience lower pressure due to the need for faster flow.

Discussion Status

The discussion is ongoing, with various interpretations being explored. Some participants have offered insights into the dynamics of laminar versus turbulent flow, while others express uncertainty about the assumptions made in the original notes. There is a recognition of counterintuitive aspects of fluid flow, and some participants are seeking further clarification on specific points.

Contextual Notes

Participants note the lack of clarity regarding whether the flow is laminar or turbulent, which affects the understanding of pressure distribution. There is also mention of figures referenced in the discussion that may contradict earlier assumptions, leading to further inquiry into the accuracy of the original notes.

  • #31
The flow of a fluid in a pipe bend can be anything from completely smooth to chaotic .

What actually happens depends on many things - such as bend geometry , flow velocity , fluid properties and initial flow pattern at entry .

Flow can also sometimes be unstable and in particular case of compressible fluids and high velocities shock waves can form .

Flow conditions can sometimes be improved by detail changes to pipe geometry . Some examples of this are : use of transition bend curvatures , return bulges and internal vanes .
 
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  • #32
Nidum said:
The flow of a fluid in a pipe bend can be anything from completely smooth to chaotic .

What actually happens depends on many things - such as bend geometry , flow velocity , fluid properties and initial flow pattern at entry .

Flow can also sometimes be unstable and in particular case of compressible fluids and high velocities shock waves can form .

Flow conditions can sometimes be improved by detail changes to pipe geometry . Some examples of this are : use of transition bend curvatures , return bulges and internal vanes .
removed
 
  • #33
foo9008 said:
yes , i want to know how can L = ND ??

Could you explain what you mean please ?
 
  • #34
Nidum said:
Could you explain what you mean please ?
posted in wrong section , sorry
 

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