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Mechanics of Sheet Flow under Simulated Rainfall
Friction factors are presented for spatially varied sheet flow with rainfall on a hydraulically smooth surface as obtained from both surface profile and hot film surface probe measurements. The results are presented in the form f = C/R, in which C increases with rainfall intensity and surface slope. A two-part velocity profile mathematical model based on von Karman's similarity hypothesis is presented and correlated with hot film measurements. Relative longitudinal turbulence intensity profiles with rainfall are characterized by a sharp increase in relative intensity near the surface and a general increase throughout the depth with increasing rainfall. Turbulent energy spectral analyses indicate that the rainfall causes a shift of the energy content to higher frequencies than for the case of uniform flow at the same Reynolds number.
Mechanics of Sheet Flow under Simulated Rainfall
Friction factors are presented for spatially varied sheet flow with rainfall on a hydraulically smooth surface as obtained from both surface profile and hot film surface probe measurements. The results are presented in the form f = C/R, in which C increases with rainfall intensity and surface slope. A two-part velocity profile mathematical model based on von Karman's similarity hypothesis is presented and correlated with hot film measurements. Relative longitudinal turbulence intensity profiles with rainfall are characterized by a sharp increase in relative intensity near the surface and a general increase throughout the depth with increasing rainfall. Turbulent energy spectral analyses indicate that the rainfall causes a shift of the energy content to higher frequencies than for the case of uniform flow at the same Reynolds number.
Mechanics of Sheet Flow under Simulated Rainfall
Yoon, Yong Nam (author) / Wenzel, Harry G. (author)
Journal of the Hydraulics Division ; 97 ; 1367-1386
2021-01-01
201971-01-01 pages
Article (Journal)
Electronic Resource
Unknown