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OPEN CHANNEL HYDRAULICS

OPEN CHANNEL FLOW. OPEN CHANNEL HYDRAULICS. Department of Water Resources and Irrigation Engineering Kombolcha Institiue of Technology. Ins.G.D. CHAPTER ONE OPEN CHANNEL FLOW. Question – What is the most obvious difference between pipe flow and open channel flow?????????????

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OPEN CHANNEL HYDRAULICS

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  1. OPEN CHANNEL FLOW OPEN CHANNEL HYDRAULICS Department of Water Resources and Irrigation Engineering KombolchaInstitiue of Technology Ins.G.D

  2. CHAPTER ONEOPEN CHANNEL FLOW • Question – • What is the most obvious difference between pipe flow and open channel flow????????????? • (in terms of flow conditions and energy situation)

  3. Open Channel Flow • Is a flow of liquid in a conduit with free space. (interface between water and air) • is applied to understand the flow of a liquid in : • Artificial channel : (flumes, spillways, canals, weirs, drainage ditch, culverts) and • Natural channel: (streams, rivers, flood plains).

  4. Open Channel Flow • Open-channel flow must have a free surface, whereas pipe flow has none.

  5. Open Channel Flow • A free surface is subject to atmospheric pressure. • In Pipe flow there exists no direct atmospheric flow but hydraulic pressure only. • it is much more difficult to solve problems of flow in open channels than in pipes. • complication comes from the position of the free surface which will change with time and space. • And also by the fact that depth of flow, the discharge, and the slopes of the channel bottom and of the free surface are all inter dependent.

  6. Summary between open channel flow and Pipe Flow Table 1

  7. Classification of open channel flow • are made according to change in flow depth with respect to time and space.

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