Abstract
The flow pattern resulting from a circular cone immersed in a rectangular channel is investigated under critical flow conditions. The apparatus may be used for both permanent and mobile discharge evaluation in open channels. Owing to the low weight, the high precision of finishing, and its reasonable price when compared to the conventional structures, the modified Venturi Channel may be regarded as a useful instrument. The circular cone is particularly well suited to watercourses in which discharge spectrum is considerable, thereby resulting in moderate approaching flow depth variation. Its rating curve is investigated by accounting for streamline curvature effects. Experiments corroborate the theoretical predictions and indicate that the flow characteristics are governed by the Froude similarity law.
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