Mean Flow Field of a Nonbuoyant Rectangular Surface Jet
Publication: Journal of Hydraulic Engineering
Volume 133, Issue 2
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.
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References
Anthony, D. G., and Willmarth, W. W. (1992). “Turbulence measurements in a round jet beneath a free surface.” J. Fluid Mech., 243, 699–720.
Launder, B. E., and Rodi, W. (1983). “The turbulent wall jets measurement and modeling.” Annu. Rev. Fluid Mech., 15, 429–459.
List, E. J. (1982). “Mechanics of turbulent buoyant jets and plumes.” Turbulent buoyant jets and plumes, 1st Ed., W. Rodi, ed., Pergamon, Oxford.
Madnia, C. K., and Bernal, L. P. (1994). “Interaction of a turbulent round jet with the free surface.” J. Fluid Mech., 261, 305–332.
Martinuzzi, R., Zaghloul, A. M., Al-Qaraguli, W., and Baddour, R. E. (1998). “Turbulence structure of plane surface-jets in a weak coflowing stream for different initial wake conditions.” ASME J. Fluids Eng., 120, 76–82.
Newman, B. G., Patel, R. P., Savage, S. B., and Tjio, H. K. (1972). “Three-dimensional wall jet originating from a circular orifice.” Aeronaut. Q., 23, 188–200.
Rajaratnam, N., and Humphries, J. A. (1984). “Turbulent non-buoyant surface jets.” J. Hydraul. Res., 22(2), 103–115.
Swean T. F., Jr., Ramberg, S. E., Plesniak, M. W., and Stewart, M. B. (1989). “Turbulent surface jet in channel of limited depth.” J. Hydraul. Eng., 115(12), 1587–1606.
Vanvari, M. R., and Chu, V. H. (1974). “Two-dimensional turbulent surface jets of low Richardson number.” Technical Rep. No. 74-2[FML], Fluid Mechanics Laboratory, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., Montreal.
Walker, D. T. (1997). “On the origin of the ‘surface current’ in turbulent free-surface flows.” J. Fluid Mech., 339, 275–285.
Walker, D. T., Chen, C.-Y., and Willmarth, W. W. (1995). “Turbulent structure in free-surface jet flows.” J. Fluid Mech., 291, 223–261.
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© 2007 ASCE.
History
Received: Jun 30, 2005
Accepted: Jun 7, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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