Spatial B-jump at sudden channel enlargements with abrupt drop

Ram, Katakam V Seetha and Prasad, Rama (1998) Spatial B-jump at sudden channel enlargements with abrupt drop. In: Journal of Hydraulic Engineering, 124 (06). pp. 643-646.

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Abstract

An analytical and experimental study of the hydraulic jump in stilling basins with abrupt drop and sudden enlargement, called the spatial B-jump here, is carried out for finding the sequent depth ratio and resulting energy dissipation. The spatial B-jump studied has its toe downstream of the expansion section, and the stream lines at the toe are characterized by downward curvature. An expression is obtained for the sequent depth ratio based on the momentum equation with suitable assumptions for the extra pressure force term because of the abrupt drop in the bed and sudden enlargement in the basin width. Predictions compare favorably with experiments. It is shown that the spatial B-jump needs less tailwater depth, thereby enhancing the stability of the jump when compared either with spatial jump, which forms in sudden expanding channels, or with B-jump, which forms in a channel with an abrupt drop in bed. It is also shown that there is a significant increase in relative energy loss for the spatial B-jump compared to either the spatial jump or B-jump alone.

Item Type:	Journal Article
Publication:	Journal of Hydraulic Engineering
Publisher:	American Society of Civil Engineers
Additional Information:	Copyright of article belongs to American Society of Civil Engineers.
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	30 Dec 2009 09:10
Last Modified:	19 Sep 2010 05:27
URI:	http://eprints.iisc.ac.in/id/eprint/19250

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