Air at 15°C forms a boundary layer near a solid wall. The velocity distribution in the boundary layer is given by Ա = 1- exp(-2) where U = 30 m/s and 8 = 1 cm. Find the shear stress at the wall (y = 0). U у u/U-1-exp(-2y/8)
Air at 15°C forms a boundary layer near a solid wall. The velocity distribution in the boundary layer is given by Ա = 1- exp(-2) where U = 30 m/s and 8 = 1 cm. Find the shear stress at the wall (y = 0). U у u/U-1-exp(-2y/8)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Example 11.1
Air at 15°C forms a boundary layer near a solid wall. The velocity distribution
in the boundary layer is given by
U
у
= 1- exp(-2)
where U = 30 m/s and d
= 30 m/s and d = 1 cm. Find the shear stress at the wall (y = 0).
U
u/U=1-exp(-2y/8)
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Please explain the derivative part better, it makes no sense to me on how the 2 came to be
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can you please explain your calculations? Im not sure on how you got 2 for the first part
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