Chapter 8: Internal Forced Convection

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Introduction• Pipe circular cross section.• Duct noncircular cross section.• Tubes small-diameter pipes.• The fluid velocity changes from zero at the surface(no-slip) to a maximum at the pipe center.• It is convenient to work with anaverage velocity, which remainsconstant in incompressible flowwhen the cross-sectional areais constant.
Page 1: Chapter 8:Internal Forced Convectio
Page 5 and 6: Average Temperature• It is conven
Page 7 and 8: Laminar and Turbulent Flow in Tubes
Page 9 and 10: • Hydrodynamic entrance region t
Page 11 and 12: - Hydrodynamically fully-developed:
Page 13 and 14: Heat Transfer coefficient and Frict
Page 15 and 16: Turbulent flow Nusselt Number• Th
Page 17 and 18: Constant Surface Heat Flux• In th
Page 19 and 20: • In the fully developed region (
Page 21 and 22: • Integrating Eq. 6-28 from x=0 (
Page 23 and 24: • Solving Eq. 8-29 for mc p gives
Page 25 and 26: • Consider a ring-shapeddifferent
Page 27 and 28: • Eq. 6-38 with the boundary cond
Page 29 and 30: Pressure Drop• One implication fr
Page 31 and 32: Temperature Profile and the Nusselt
Page 33 and 34: Constant Surface Heat Flux- Laminar
Page 35 and 36: • Substituting the velocity and t
Page 37 and 38: Laminar Flow in Noncircular Tubes
Page 39 and 40: Developing Laminar Flow in the Entr
Page 41 and 42: • Modified correlations are avail

Chapter 8: Internal Forced Convection

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