at V = 2 m/s, T = 45°C, and atmospheric pressur over an isothermal plate at T, = 20°C. In the first case, Re, = 5 x 10°, while in the second case the flow is tripped to a turbulent state at x=0 m. At what x-location are the thermal boundary layer thicknesses of the two %3D ual2 Wbot ore th locel hoot Auves ot this loco

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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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7.11 Consider two cases involving parallel flow of dry air
at V = 2 m/s, T = 45°C, and atmospheric pressure
over an isothermal plate at T, = 20°C. In the first case,
Ree = 5 x 10°, while in the second case the flow is
tripped to a turbulent state at x = 0 m. At what x-location
are the thermal boundary layer thicknesses of the two
cases equal? What are the local heat fluxes at this loca-
tion for the two cases?
Transcribed Image Text:7.11 Consider two cases involving parallel flow of dry air at V = 2 m/s, T = 45°C, and atmospheric pressure over an isothermal plate at T, = 20°C. In the first case, Ree = 5 x 10°, while in the second case the flow is tripped to a turbulent state at x = 0 m. At what x-location are the thermal boundary layer thicknesses of the two cases equal? What are the local heat fluxes at this loca- tion for the two cases?
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