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Energy loss for a highly Meandering open Channel Flow

Author Affiliations

  • 1 Department of Civil Engineering, N.I.T. Rourkela, INDIA
  • 2
  • 3
  • 4

Res. J. Engineering Sci., Volume 2, Issue (4), Pages 22-27, April,26 (2013)

Abstract

Flow in meandering channel is quite ubiquitous for natural flow systems such as in rives. Rivers generally follow this pattern for minimization of energy loss. However, several factors such as environmental condition, roughness are responsible for generation of this path for rivers. Selection of proper value of Roughness coefficient is essential for evaluating the actual carrying capacity of Natural channel. An excessive value underestimates the discharge and a low value can over estimates. Suggested values for Manning's n are found tabulated in many standard articles. The resistance to the flow in a river is dependent on a number of flow and surface and geometrical parameters. The usual practice in one dimensional analysis is to select a value of n depending on the channel surface roughness and take it as uniform for the entire surface for all depths of flow. The influences of all the parameters are assumed to be lumped into a single value of Manning’s n .It is seen that Manning’s coefficient n not only denotes the roughness characteristics of a channel but also the energy loss in the flow. The larger the value of n, the higher is the loss of energy within the flow. Experimental investigations concerning the loss of energy of flows for a highly meandering channel for different flow condition, geometry are presented.

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