Murthy, Keshava K and Ramesh, HS and Prakash, Shesha MN (1995) Geometrically Simple Logarithmic Weir. In: Journal of Irrigation and Drainage Engineering, 121 (6). pp. 419-426.
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This paper discusses the design and experimental verification of a geometrically simple logarithmic weir. The weir consists of an inward trapezoidal weir of slope 1 horizontal to n vertical, or 1 in n, over two sectors of a circle of radius R and depth d, separated by a distance 2t. The weir parameters are optimized using a numerical optimization algorithm. The discharge through this weir is proportional to the logarithm of head measured above a fixed reference plane for all heads in the range 0.23R less than or equal to h less than or equal to 3.65R within a maximum deviation of +/-2% from the theoretical discharge. Experiments with two weirs show excellent agreement with the theory by giving a constant average coefficient of discharge of 0.62. The application of this weir to the field of irrigation, environmental, and chemical engineering is highlighted.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to American Society of Civil Engineers.|
|Department/Centre:||Division of Mechanical Sciences > Civil Engineering|
|Date Deposited:||31 May 2011 08:40|
|Last Modified:||31 May 2011 08:40|
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