Drag. To see why golf balls are rough, estimate the terminal speed of a golf ball falling through atmospheric air if D = 0.05 m, M = 0.05 kg, for two cases: (a) a normal golf ball; (b) a smooth ball; use drag data form fig 9.18. A bit of trial and error - guess CD & check. Verify your CD guess and iterate once if necessary. Show any iteration result clearly. State if the BL is laminar or turbulent for each case.
Drag. To see why golf balls are rough, estimate the terminal speed of a golf ball falling through atmospheric air if D = 0.05 m, M = 0.05 kg, for two cases: (a) a normal golf ball; (b) a smooth ball; use drag data form fig 9.18. A bit of trial and error - guess CD & check. Verify your CD guess and iterate once if necessary. Show any iteration result clearly. State if the BL is laminar or turbulent for each case.
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 5.8P
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Assume Patm = 10^5, Pa = 14.7 psi ; ρwater ~ 1000 kg/m3 ; ρair ~ 1.2 kg/m3 ; μwater ~ 10^-3 N•s/m2 ; μair ~ 2 x 10^-5 N•s/m2 ; Vwater ~ 10^-6 m2 /s ; Vair ~ 1.67 x 10^-5 m2 /s ; g = 9.8 m/s^2 .; 1 m/s = 2.24 mph ; 1lbf = 4.45 N ; 1 m^3 = 264 gallons
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