Air at free-stream velocity of 8 m/s flows over a thin flat plate of length 5 m and width 1 m. A lamirar boundary layer develops from the leading edge of the flat plate. At Re,= 800 000, the boundary layer becomes a turbulent boundary layer where x is the distance from the leading edge. par = 1.2 kg/m', lais = 1.8 x 10 kg/m.s a) Estimate the length of the laminar boundary layer. b) Estimate the drag force duz the laminar boundary layer on one side of the flat plate. c) Wall shear stress atr=5 m.

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Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.30P: Air at 1000C flows at an inlet velocity of 2 m/s between two parallel flat plates spaced 1 cm apart....
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Air at free-stream velocity of 8 m/s flows over a thin flat
plate of length 5 m and width 1 m. A lamirar boundary layer
develops from the leading edge of the flat plate. At Re, = 800
000, the boundary layer becomes a turbulent boundary layer
where x is the distance from the leading edge.
pair = 1.2 kg/m', lair = 1.8 x 105 kg/m.s
(a)
Estimate the length of the laminar boundary layer.
(b)
Estimate the drag force due the laminar boundary layer on
one side of the flat plate.
(c)
Wall shear stress atr= 5 m.
Transcribed Image Text:Air at free-stream velocity of 8 m/s flows over a thin flat plate of length 5 m and width 1 m. A lamirar boundary layer develops from the leading edge of the flat plate. At Re, = 800 000, the boundary layer becomes a turbulent boundary layer where x is the distance from the leading edge. pair = 1.2 kg/m', lair = 1.8 x 105 kg/m.s (a) Estimate the length of the laminar boundary layer. (b) Estimate the drag force due the laminar boundary layer on one side of the flat plate. (c) Wall shear stress atr= 5 m.
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