A long, slender, smooth 3-cm-diameter flagpole bendsalarmingly in 20 mi/h sea-level winds, causing patrioticcitizens to gasp. An engineer claims that the pole will bendless if its surface is deliberately roughened. Is she correct,at least qualitatively?

A long, slender, smooth 3-cm-diameter flagpole bendsalarmingly in 20 mi/h sea-level winds, causing patrioticcitizens to gasp. An engineer claims that the pole will bendless if its surface is deliberately roughened. Is she correct,at least qualitatively?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.29P: Air at 20C flows at 1 m/s between two parallel flat plates spaced 5 cm apart. Estimate the distance...

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Question

A long, slender, smooth 3-cm-diameter flagpole bends
alarmingly in 20 mi/h sea-level winds, causing patriotic
citizens to gasp. An engineer claims that the pole will bend
less if its surface is deliberately roughened. Is she correct,
at least qualitatively?

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