Influence of secondary current on vertical concentration distribution in an open channel flow

Abstract

Considering the effect of secondary current for a steady turbulent flow through straight rectangular open channels, analytical models for suspended sediment concentration distribution are derived from two-phase flow analysis. The proposed models significantly improve the Rouse equation and show that secondary currents have considerable effect on sediment concentration distribution. Finally, models are verified with the experimental data available in the literature, and a good agreement has been achieved between the calculated values and observed data.

Keywords:

• two-phase turbulent flow
• diffusion theory
• secondary currents
• concentration distribution
• Rouse equation

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Corrigendum

Acknowledgement

The first author (K.G.) is thankful to Prof. B. S. Mazumder of the Indian Statistical Institute, Kolkata, for the experiments (data plotted in Figure 1) done in his Fluvial Mechanics Laboratory during the first author’s post-doctoral work over there.

This article is among the selected papers presented at the “Hydro-2012” conference held at IIT Bombay on 7-8 December 2012 and short-listed by the Editor for publication in this Journal after re-review and revisions where necessary.