The reynolds number and channel geometry have only a

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Unformatted text preview: surface rise with small rollers, known as a weak jump; dissipation 5 to 15 percent. 2 1 (a) V1 y2 y1 V2 (b) (c) (d ) Fig. 10.12 Classification of hydraulic jumps: (a) Fr 1.0 to 1.7: undular jumps; (b) Fr 1.7 to 2.5: weak jump; (c) Fr 2.5 to 4.5: oscillating jump; (d) Fr 4.5 to 9.0: steady jump; (e) Fr 9.0: strong jump. (Adapted from Ref. 16.) | v v 679 | e-Text Main Menu (e) | Textbook Table of Contents | Study Guide 680 Chapter 10 Open-Channel Flow Fr1 Fr1 Fr1 2.5 to 4.5: Unstable, oscillating jump; each irregular pulsation creates a large wave which can travel downstream for miles, damaging earth banks and other structures. Not recommended for design conditions. Dissipation 15 to 45 percent. 4.5 to 9.0: Stable, well-balanced, steady jump; best performance and action, insensitive to downstream conditions. Best design range. Dissipation 45 to 70 percent. 9.0: Rough, somewhat intermittent strong jump, but good performance. Dissipation 70 to 85 percent. Further details can be found in Ref. 16 and Ref. 3, chap....
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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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