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CE Fluid Mechanics Diogo Bolster

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Presentation on theme: "CE Fluid Mechanics Diogo Bolster"— Presentation transcript:

1 CE30460 - Fluid Mechanics Diogo Bolster
Chapter 8 – Pipe Flow CE Fluid Mechanics Diogo Bolster

2 Laminar or Turbulent Flow
Re>4000 Re<1000 Re=UDr/m Laminar Flow Turbulent Flow

3 Fully Developed Flow Entrance length:

4 Fully Developed Laminar Flow
We’ve done this one already in chapter 6

5 What about Turbulent Flow
Typically: n is between 6 and 10

6 Dimensional Analysis Pressure Drop depends on By dimensional Analysis
Mean velocity V Diameter D Pipe length l Wall Roughness e Viscosity m Density r By dimensional Analysis

7 Pressure drop must increase linearly with length of tube
Recall from chapter 5 Therefore we can say that (part of) the loss in a pipe is Friction factor – look up in table

8 Moody Diagram (Friction Factor)
For laminar For non-laminar flow approximately true that

9 Roughness (Typical)

10 Minor Losses KL depends on the flow (expansion, contraction, bend, etc)

11 Minor Losses

12 Minor Losses

13 Sample Problem

14 Sample Problem

15 Sample Problem

16 Pipe Flow Measurement C is a constant that depends on geometry

17 Sample Problem

18 More Problems

19 Single Pipe – Determine Pressure Drop

20 Single Pipe – Determine Flowrate

21 Single Pipe – Determine Diameter

22 Multiple Pipe Systems


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