Abstract
This paper is concerned with the science of turbulent diffusion and not, except incidentally, with its numerous practical applications. It discusses some recent research, particularly that by the authors and their collaborators. Among the topics considered are (i) the intermittency factor, (ii) the relationship between the mean of the concentration and its variance, and (iii) the interpretation of data. The principal aim of the paper is to draw attention to some outstanding basic questions which would seem promising targets for future research. Without progress on these questions (and others), regulatory modesl of air quality will continue-inevitably-to be unreliable and hardly worth using.
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References
Allen, C.M. 1982Numerical simulation of contaninant dispersion in estuary flows. Proc. Roy. Soc. Lond.A381, 179–194.
Chatwin, P.C. 1989Scalar transport in turbulent shear flows. Lecture Series 1989-03 (Turbulent Shear Flows), von Karman Institute for Fluid Dynamics, Rhode-St-Genèse. Belgium.
Chatwin, P.C. 1990Statistical methods for assessing hazards due to dispersing gases. Environmetrics1, 143–162.
Chatwin P.C. 1991New research on the role of concentration fluctuation in useful models of the consequences of accidental releases of dangerous gases. Proc. Int. Conf. & Workshop on Modeling and Mitigating the Consequences of Accidental Releases of Dangerous Materials. (New Orleans, LA; published by AIChE, New York), 327–339.
Chatwin, P.C. & Sullivan, P.J. 1979.The relative diffusion of a cloud of passive contaminant in incompressible turbulent flow. J. Fluid Mech.91, 337–355.
Chatwin, P.C. & Sullivan, P.J. 1980.Some turbulent diffusion invariants. J. Fluid Mech.97, 405–416.
Chatwin, P.C. & Sullivan, P.J. 1989a.The intermittency factor of scalars in turbulence Phys. FluidsA1, 761–763.
Chatwin, P.C. & Sullivan, P.J. 1989b.The intermittency factor of dispersing scalars in turbulent shear flows. Some applications of a new definition. Proc. 7th Symp. on Turb. Shear Flows (Stanford Univ., CA), 29.4.1–29.4.6.
Chatwin, P.C. & Sullivan, P.J. 1990a.A simple and unifying physical interpretation of scalar fluctuation measurements from many turbulent shear flows. J. Fluid Mech.,212, 533–556.
Chatwin, P.C. & Sullivan, P.J. 1990b. Vol.1, No. 2 of Environmetrics (special editors).
Chatwin, P.C., Sullivan, P.J. and Yip, H. 1990Dilution and marked fluid particle analysis. Proc. Int. Conf. on Phys. Modelling of Transport & Dispersion (in conjunction withThe Garbis H. Keulegan Symp.) (MIT, Cambridge MA, edited by E. Eric Adams & George E. Hecker), 6B.3–6B.8.
Kaplan, H. & Dinar, N. 1988.A stochastic model for dispersion and concentration distribution in homogeneous turbulence. J. Fluid. Mech.190, 121–140.
Mole, N. 1989.Estimating Statistics of concentration fluctuations from measurements. Proc. 7th Symp. on Turb. Shear Flows (Stanford Univ., CA), 29.5.1–29.5.6.
Mole, N. 1990a.A model of instrument smoothing and thresholding in measurements of turbulent dispersion. Atmos. Envir.24A, 1313–1323.
Mole, N. 1990b.Some interactions between turbulent dispersion and statistics. Environmetrics,1, 179–194.
Moseley, D.J. 1991.A closure hypothesis for contaminant fluctuations in turbulent flow. M. Sc. thesis, Faculty of Graduate Studies, Univ. of Western Ontario, London, Canada.
Moseley D.J. & Sullivan, P.J. 1991.A simple closure hypothesis for the prediction of contaminant concentration fluctuations in turbulent flows (private communication of draft MS).
Nakamura, I., Sakai, Y. & Miyata, M. 1987Diffusion of matter by a non-buoyant plume in grid-generated turbulence. J. Fluid Mech.178, 379–403.
Sakai, Y. Nakamura, I., Tsunoda, H. & Shengian, L. 1990. Private communication (and lecture presented at Euromech 253, Brunel Univ., Uxbridge, UK. August 1989).
Sullivan, P.J. 1971.Longitudinal dispersion within a two-dimensional turbulent shear flow. J. Fluid Mech49, 551–576.
Sullivan, P.J. 1990.Physical modeling of contaminant diffusion in environmental flows. Environ-metrics1, 163–177.
Thomson, D.J. 1990.A stochastic model for the motion of particle pairs in isotropic high-Reynolds-number turbulènce, and its application to the problem of concentration variance. J. Fluid Mech210, 113–153.
Warhaft, Z. 1984.The interference of thermal fields from line sources in grid turbulence. J. Fluid Mech.144, 363–387.
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Chatwin, P.C., Sullivan, P.J. The structure and magnitude of concentration fluctuations. Boundary-Layer Meteorol 62, 269–280 (1993). https://doi.org/10.1007/BF00705558
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DOI: https://doi.org/10.1007/BF00705558