MECE251 Fluids Lesson 9 part I Pipe Flow

MECE-251 Fluids, Lesson 9 (part I): Pipe Flow 1 - Read Text Sections 2 - Solve Chapter Problems 3 & 4 – Lectures, Example, and Review Problems 5 - Solve Case Study 6 - Complete On-line Lesson Quiz R·I·T MECE-251 1

Last lesson • Bernoulli’s equation for frictionless flow • Shear stress • Pressure loss in pipes results from shear stress Objectives of this week • Quantify pipe losses • Account for power from a pump or compressor R·I·T MECE-251 2

Fully Developed Laminar Flow in a Pipe R·I·T Velocity Distribution Volume Flow Rate Shear Stress Distribution Flow Rate as a Function of Pressure Drop MECE-251 3

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Figure 8. 4 (p. 404) Time dependence of fluid velocity at a point. R·I·T MECE-251 5

Re < 2000 Re ~ 2000 Re > 2000 R·I·T MECE-251 6

Increasing Reynolds # R·I·T MECE-251 7

Page 430 R·I·T MECE-251 8

Energy Considerations in Pipe Flow • Major Losses • Head Loss R·I·T MECE-251 9

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• Pumps, Fans, Blowers, Turbines - DHpump DH R·I·T g MECE-251 12

Next Steps L 9 Task 3 B: Please review the example problem on line. L 9 Task 3 C: Then, solve the review problem. L 9 Task 4 B: Please review the example problems on line. L 9 Task 4 C: Then, solve the review problem. L 9 Task 5: L 9 Task 6: Form groups and work on your case study. Take the Lesson 9 quiz. Reference: Schaum’s Outline of Thermodynamics for Engineers, Second Edition, M. C. Potter and C. W. Somerton, Mc. Graw Hill Several Images are from Fundamentals of Fluid Mechanics, 5/E by Bruce Munson, Donald Young, and Theodore Okiishi R·I·T MECE-251 13