Chapt10

If surface tension is included in the analysis of

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Unformatted text preview: uniform flow. Textbook Table of Contents | Study Guide Problems 697 P10.12 (a) For laminar draining of a wide thin sheet of water on pavement sloped at angle , as in Fig. P4.36, show that the flow rate is given by Q P10.13 P10.14 P10.15 P10.20 *P10.21 gbh3 sin 3 where b is the sheet width and h its depth. (b) By (somewhat laborious) comparison with Eq. (10.13), show that this expression is compatible with a friction factor f 24/Re, where Re Vavh/ . The laminar-draining flow from Prob. 10.12 may undergo transition to turbulence if Re 500. If the pavement slope is 0.0045, what is the maximum sheet thickness, in mm, for which laminar flow is ensured? The Chézy formula (10.18) is independent of fluid density and viscosity. Does this mean that water, mercury, alcohol, and SAE 30 oil will all flow down a given open channel at the same rate? Explain. The finished-concrete channel of Fig. P10.15 is designed for a flow rate of 6 m3/s at a normal depth of 1 m. Determine (a) the design slope of...
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.

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