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Mean Flow Field of a Nonbuoyant Rectangular Surface Jet |
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| Authors: | Soheil Gholamreza-Kashi Robert J. Martinuzzi Raouf E. Baddour |
| Affiliation: | 1Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, Univ. of Western Ontario, London ON, Canada N6A 5B9. E-mail: sgholam2@uwo.ca 2Professor, Dept. of Mechanical and Manufacturing Engineering, Univ. of Calgary, 2500 University Dr. NW, Calgary AB, Canada T2N 1N4. E-mail: rmartinu@ucalgary.ca 3Professor, Dept. of Civil and Environmental Engineering, Univ. of Western Ontario, London ON, Canada N6A 5B9. E-mail: rbaddour@eng.uwo.ca |
| Abstract: | The flow field for a low Froude number nonbuoyant rectangular surface jet is studied using laser induced fluorescence and laser Doppler velocimetry. It is shown that a surface current develops in turbulent, but not in laminar jets. The existence of a self-similar regime is established. The lateral growth rate of the jet below the surface is about 4.8 times its vertical growth rate, while that of the surface current is 8.8 times. The vertical growth rate is about half that of a plane surface jet and less than one third that of a free axisymmetric jet. While the horizontal profiles of the streamwise velocity are similar to those observed in free, submerged, and wall jets, the vertical distributions are distinctly flatter. |
| Keywords: | Shear flow Surface jets Three-dimensional flow Turbulent flow |