Assume air at 20°C and atmospheric pressure on a smooth flat plate with a speed free current of 25 m/s (kinematic viscosity of 1.5x10-5 m2/s and density 1.2 kg/m3). The plate is 4 m long and 1.5 m wide. If the boundary layer is initially laminate and then become turbulent boundary layer with a transition Re of 5x10^5: a) What is the drag coefficient for the plate? b) What is the drag force on the entire plate? c) At what distance x from the plate the profile becomes turbulent. d) What is drag force on the turbulent part? e) What is the drag force on the laminar part

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8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.49P
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Assume air at 20°C and atmospheric pressure on a smooth flat plate with a speed free current of 25 m/s (kinematic viscosity of 1.5x10-5 m2/s and density 1.2 kg/m3). The plate is 4 m long and 1.5 m wide. If the boundary layer is initially  laminate and then become turbulent boundary layer with a transition Re of 5x10^5:

a) What is the drag coefficient for the plate?
b) What is the drag force on the entire plate?
c) At what distance x from the plate the profile becomes turbulent.
d) What is drag force on the turbulent part?
e) What is the drag force on the laminar part?

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