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Proportional Weirs as Velocity Controlling Devices

Rao, Nagar S Lakshmana and Chandrasekaran, Duraiswamy (1977) Proportional Weirs as Velocity Controlling Devices. In: Journal of the Hydraulics Division-ASCE, 103 (6). pp. 633-648.

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Official URL: http://cedb.asce.org/cgi/WWWdisplay.cgi?5013016


Of the many factors that govern the settling phenomenon, the flow velocity in the settling tanks can be controlled favorably by fixing suitably designed weirs at the outlets of the tanks. The velocity at the bottom should not dislodge the particles that have already settled. These requirements might be met with by velocities which are controlled to be constant with respect to the depth of flow, or velocities which reduce linearly with increasing depth or velocities that vary inversely with the depth. To achieve these types of velocity control, new proportional weirs have been designed. Very near to the outlet of the tank, over a small length, the flow was found to be turbulent and noncompliant with the expected type of velocity control. This small length of the disturbance may be provided over and above the theoretical settling length of the tank, for efficient sedimentation.

Item Type: Journal Article
Publication: Journal of the Hydraulics Division-ASCE
Publisher: American Society of Civil Engineers
Additional Information: Copyright of this article belongs to American Society of Civil Engineers.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 04 Feb 2010 06:03
Last Modified: 26 Oct 2018 06:42
URI: http://eprints.iisc.ac.in/id/eprint/24502

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