Estimate the 99% boundary layer thickness in the following cases (1) A light breeze over a flat building roof (length=15 m, velocity=5 m/s) (2) A wind passing over an ocean (length=2km, velocity=150 km/h) The kinematic viscosity of air is 1.5x10^(-5) m^2/s. Calculate the Reynolds number based on the boundary layer thickness (instead of the length scale shown above) and the velocity scale in these flows. We assume these flows to be laminar. Choose two answers for the results.

Principles of Physics: A Calculus-Based Text
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Chapter15: Fluid Mechanics
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Problem 48P: An airplane is cruising at altitude 10 km. The pressure outside the craft is 0.287 atm; within the...
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100%
Estimate the 99% boundary layer thickness in the following cases
(1) A light breeze over a flat building roof (length=15 m, velocity=5 m/s)
(2) A wind passing over an ocean (length=2km, velocity=150 km/h)
The kinematic viscosity of air is 1.5x10^(-5) m^2/s. Calculate the Reynolds number based on the boundary
layer thickness (instead of the length scale shown above) and the velocity scale in these flows. We assume
these flows to be laminar. Choose two answers for the results.
0.1677 m, 5.00×10^6
0.0335 m, 1.12×10^4
0.1342 m, 3.73x10^5
0.0042 m, 1.18x10^4
Transcribed Image Text:Estimate the 99% boundary layer thickness in the following cases (1) A light breeze over a flat building roof (length=15 m, velocity=5 m/s) (2) A wind passing over an ocean (length=2km, velocity=150 km/h) The kinematic viscosity of air is 1.5x10^(-5) m^2/s. Calculate the Reynolds number based on the boundary layer thickness (instead of the length scale shown above) and the velocity scale in these flows. We assume these flows to be laminar. Choose two answers for the results. 0.1677 m, 5.00×10^6 0.0335 m, 1.12×10^4 0.1342 m, 3.73x10^5 0.0042 m, 1.18x10^4
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