Laser-Induced Fluorescence Measurements of a Turbulent Plume
Publication: Journal of Engineering Mechanics
Volume 129, Issue 10
Abstract
The laser-induced fluorescence (LIF) measurement technique is discussed in the context of environmental fluid mechanics. The measurement equipment and procedures employed in our laboratory are described in detail. The technique is applied to an isokinetic chemical plume (neutrally buoyant) in a turbulent open channel flow. A nonuniform laser sweep rate is employed to take full advantage of the dynamic range of the digital camera over the entire spatially varying concentration field. Statistical measures of the concentration field, such as the average and variance, are presented and discussed. Comparisons are made with theoretical models and previous experimental observations. The plume width grows at a greater rate in the downstream direction than that predicted by the analytical model of a point source release into a uniform flow. Probability density function distributions do not resemble Gaussian distributions, which reflects the highly intermittent nature of the concentration time record. The current measurements suggest that LIF is a valuable technique for nonintrusively recording the scalar field evolution in turbulent flows.
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References
Arcoumanis, C., McGuirk, J. J., and Palma, J. M. L. M.(1990). “On the use of fluorescent dyes for concentration measurements in water flows.” Exp. Fluids, 10, 177–180.
Bara, B. M., Wilson, D. J., and Zelt, B. W.(1992). “Concentration fluctuation profiles from a water channel simulation of a ground-level release.” Atmos. Environ., Part A, 26A, 1053–1062.
Batchelor, G. K.(1959). “Small-scale variation of convected quantities like temperature in turbulent fluid. Part 1. General discussion and the case of small conductivity.” J. Fluid Mech., 5, 113–133.
Borg, A., Bolinder, J., and Fuchs, L.(2001). “Simultaneous velocity and concentration measurements in the near field of a turbulent low-pressure jet by digital particle image velocimetry-planar laser-induced fluorescence.” Exp. Fluids, 31, 140–152.
Chen, D., and Jirka, G. H.(1999). “LIF study of plane jet bounded in shallow water layer.” J. Hydraul. Eng., 125(8), 817–826.
Cowen, E. A., Chang, K.-A., and Liao, Q.(2001). “A single-camera coupled PTV-LIF technique.” Exp. Fluids, 31, 63–73.
Crimaldi, J. P., and Koseff, J. R.(2001). “High-resolution measurements of the spatial and temporal scalar structure of a turbulent plume.” Exp. Fluids, 31, 90–102.
Crimaldi, J. P., Wiley, M. B., and Koseff, J. R.(2002). “The relationship between mean and instantaneous structure in turbulent passive scalar plumes.” J. Turbulence, 3(014), 1–24.
Dahm, W. J. A., and Dimotakis, P. E.(1987). “Measurements of entrainment and mixing in turbulent jets.” AIAA J., 25, 1216–1223.
Fackrell, J. E., and Robins, A. G.(1982). “Concentration fluctuations and fluxes in plumes from point sources in a turbulent boundary layer.” J. Fluid Mech., 117, 1–26.
Ferrier, A. J., Funk, D. R., and Roberts, P. J. W.(1993). “Application of optical techniques to the study of plumes in stratified fluids.” Dyn. Atmos. Oceans, 20, 155–183.
Fischer, H. B., List, E. J., Koh, R. C. Y., Imberger, J., and Brooks, N. H. (1979). Mixing in inland and coastal waters, Academic, San Diego.
Guilkey, J. E., Kerstein, A. R., McMurtry, P. A., and Klewicki, J. C.(1997). “Mixing mechanisms in turbulent pipe flow.” Phys. Fluids, 9, 717–723.
Karasso, P. S., and Mungal, M. G.(1997). “PLIF measurements in aqueous flows using the Nd:YAG laser.” Exp. Fluids, 23, 382–387.
Kolmogorov, A. N.(1941). “The local structure of turbulence in incompressible viscous fluid for very large Reynolds numbers.” Dokl. Akad. Nauk Arm. SSR, 30, 301.
Koochesfahani, M. M., and Dimotakis, P. E.(1985). “Laser-induced fluorescence measurements of mixed fluid concentration in a liquid plane shear layer.” AIAA J., 23, 1700–1707.
Koochesfahani, M. M., and Dimotakis, P. E.(1986). “Mixing and chemical reactions in a turbulent mixing layer,” J. Fluid Mech., 170, 83–112.
Law, A. W.-K., and Wang, H.(2000). “Measurements of mixing processes using combined digital particle tracking velocimetry and planar laser induced fluorescence.” Exp. Therm. Fluid Sci., 22, 213–229.
Nezu, I., and Rodi, W.(1986). “Open-channel flow measurements with a laser Doppler anemometer.” J. Hydraul. Eng., 112(5), 335–355.
Sakakibara, J., Hishida, K., and Maeda, M.(1997). “Vortex structure and heat transfer in the stagnation region of an impinging plane jet (simultaneous measurements of velocity and temperature fields by digital particle image velocimetry and laser-induced fluorescence).” Int. J. Heat Mass Transfer, 40, 3163–3176.
Tennekes, H., and Lumley, J. L. (1972). A first course in turbulence, MIT Press, Cambridge, Mass.
Tracy, H. J., and Lester, C. M. (1961). “Resistance coefficients and velocity distribution smooth rectangular channel.” Paper No. 1592-A, Geological Survey Water-Supply, U.S. Government Printing Office, Washington, D.C.
Webster, D. R., Roberts, P. J. W., and Ra’ad, L.(2001). “Simultaneous DPTV/PLIF measurements of a turbulent jet.” Exp. Fluids, 30, 65–72.
Webster, D. R., and Weissburg, M. J.(2001). “Chemosensory guidance cues in a turbulent chemical odor plume.” Limnol. Oceanogr., 46, 1034–1047.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 129 • Issue 10 • October 2003
Pages: 1130 - 1137
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Nov 14, 2001
Accepted: Aug 23, 2002
Published online: Sep 15, 2003
Published in print: Oct 2003
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