1 / 9

Gradually Varied Flow (2)

Gradually Varied Flow (2). Equations. Bottom slope Mild if (subcritical); Steep if (supercritical); and Critical if Mild and steep slopes (3 Zones); the rest slopes have only two regions

camdyn
Télécharger la présentation

Gradually Varied Flow (2)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Gradually Varied Flow (2)

  2. Equations • Bottom slope • Mild if (subcritical); • Steep if (supercritical); and • Critical if • Mild and steep slopes (3 Zones); the rest slopes have only two regions • The upper line is NDL if the channel bottom slope is mild, and the upper line is CDL if the bottom slope is steep.

  3. Remarks • For a water surface profile in a channel with mild slope then we infer that • The flow depth, , in the three zones is classified as follows: • Zone 1: ; • Zone 2: ; and • Zone 3:

  4. Profiles • (M1 Profile): since it is mild slope then the upper line is NDL. Since in Zone 1, . since • This means that y increases with distance x

  5. Profiles • (M2 Profile): in this case since . because • This means, decreases as increases

  6. Profiles • (M3 Profile): in this case since . because • This means, increases as increases

  7. Real-life cases of water surface profiles (Choudhry, 2008)

  8. Example (1) (Choudhry, 2008)

  9. Example (2): Consider two different cases of gate opening (Choudhry, 2008)

More Related