Turbulence and Reynolds Stress Distribution in a Natural River

by Bijoy S. Mazumder, ISWS, Calcutta, India,
Nani G. Bhowmik, ISWS, Calcutta, India,
Ta Wei Soong, ISWS, Calcutta, India,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Turbulence characteristics of ambient flow velocities and their comparison with those generated by the movement of barge traffic within the channel border area in a navigation waterway are discussed in this paper. The ambient velocity and the changes of velocity due to barge traffic are being continuously measured with time at three distances from the shore on one side of the Illinois River near McEvers Island. The analysis of velocity data includes the longitudinal and lateral components of velocity, turbulence intensities u' and v', and the variation of Reynolds stress (-?UV) with time. The lateral variations of Reynolds stress distributions (-?UV) for the ambient velocity and the velocity due to the movement of barge traffic have also been studied. The analysis shows that the maximum turbulence shear stress generated by the changes of velocity due to barge traffic is significantly higher than that for the natural flow in the river. Movement of barge traffic in the upstream or downstream direction produces more transverse turbulence shear than the natural river flow.

Subject Headings: Stress analysis | Reynolds stress | Velocity distribution | Turbulence | Stress distribution | Shear stress | Water transportation | Illinois | United States

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