Supercritical Flow over Sills

by John A. McCorquodale, Assoc. Prof.; Dept. of Civ. Engrg., Univ. of Windsor, Windsor, Ontario, Canada,
M. K. Giratalla, Grad. Student; Dept. of Civ. Engrg., Univ. of Windsor, Windsor, Ontario, Canada,

Serial Information: Journal of the Hydraulics Division, 1972, Vol. 98, Issue 4, Pg. 667-679

Document Type: Journal Paper

Errata: (See full record)


A conformal mapping solution for irrotational gravity-free flow is modified to determine an expression for the drag on continuous and dentated sills. The effect of gravity is partially accounted for by the inclusion of the upstream hydrostatic force in the momentum equations. For the dentated sill case, continuity, energy and momentum relationships were used to divide the total flow into two portions, i.e., one passing between the baffles and another passing over the baffles. Two-dimensional techniques were then applied to determine the baffle drag coefficient. Good agreement was found between experimental and theoretical drag coefficients for both the continuous and dentated sills for (jet height)/(baffle height) 1.4.

Subject Headings: Reefs and sills | Supercritical flow | Baffles (hydraulic) | Drag (fluid dynamics) | Mapping | Gravity forces | Agreements and treaties | Hydrostatics | Rivers and streams

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