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# hw3 - Problems from White#1 = P7.3 Hint this should look...

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Problems from White #1 = P7.3 Hint: this should look familiar #2 = P7.5 Note: in an accelerating flow, i.e. a favorable pressure gradient, the boundary layer will be thinner (and more likely to be laminar – hence with a nice bell mouthed inlet to a pipe, the flow tends to be laminar regardless of Re number.) #3 = P7.9 Repeat the flat plate momentum analysis of Sec. 7.2 by replacing the parabolic profile, Eq. (7.6), with a more accurate sinusoidal profile: sin 2 u y U π δ = Compute momentum-integral estimates of * , / , / , and . f c x x H θ δ #4 = P7.20 For air at 20 o C please take ρ = 1.2 kg/m 3 and μ = 1.8 x 10 -5 kg/(m-s); water ρ = 998 kg/m 3 . Use Bernoulli equation to determine u at inlet of Pitot tube. Once you determine u/U then use Table 7.1 to determine η and then x. #5 = P7.26 Let the force on a single plate be F 1 . Please provide the force on the two configurations of four plates (a and b) in terms of F 1 . #6 = P7.36 Hint: Re L = 1025 (V) 125 / 0.00107 ~ 120,000,000 x V so surely turbulent!

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hw3 - Problems from White#1 = P7.3 Hint this should look...

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