Turbulence Prediction in Open Channel Flow

by Ruh-Ming Li, (M.ASCE), Assoc. Prof.; Dept. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo.,
Daryl B. Simons, (F.ASCE), Prof.; Dept. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo.,
James D. Schall, Research Assoc.; Dept. of Civ. Engrg., Colorado State Univ., Fort Collins, Colo.,


Serial Information: Journal of the Hydraulics Division, 1980, Vol. 106, Issue 4, Pg. 575-587


Document Type: Journal Paper

Discussion: Temple Darrel M. (See full record)
Discussion: Kumar Arun (See full record)

Abstract: An analytical model for predicting turbulent intensities of velocity for the streamwise and cross-streamwise directions in open channel flow was derived. Due to the random nature of turbulence, a probabilistic approach to the problem is required. A Gaussian distribution was assumed to describe the turbulent fluctuating velocities. From this basic condition, a three-parameter model was derived to predict the root-mean-square (rms) values of turbulence for the vertical and longitudinal directions. Values calculated from the mathematical model were compared to experimentally obtained data using hot-film anemometry techniques, and excellent agreement existed for both components of rms.

Subject Headings: Turbulent flow | Open channel flow | Turbulence | Velocity distribution | Mathematical models | Data processing | Model analysis | Hydraulic models

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