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Concentration fluctuations in plumes

  • Author(s) / Creator(s)
  • The random fluctuations of concentration levels in a plume is studied using a wind tunnel simulation of dispersion in the neutrally stable atmospheric boundary layer. A fast response hot - film probe is developed and used to measure high frequency fluctuations of helium tracer concentration in the wind tunnel. A statistical intermittent log - normal concentration model is developed and successfully compared with measured peak - to - mean ratios and complete probability density functions of the concentration fluctuations; the model parameters are concentration mean, variance and intermittency. The highest peak concentrations are observed to occur about two thirds of the distance out to the point of maximum mean concentration.

  • Date created
    1979
  • Subjects / Keywords
  • Type of Item
    Report
  • DOI
    https://doi.org/10.7939/R3H98ZC62
  • License
    Conditions of Use Netterville, D.D.J., 1979. Concentration fluctuations in plumes. Syncrude Canada Ltd., Edmonton, Alberta. Environmental Research Monograph 1979-4. 228 pp. Permission for non-commercial use, publication or presentation of excerpts or figures is granted, provided appropriate attribution (as above) is cited. Commercial reproduction, in whole or in part, is not permitted without prior written consent. The use of these materials by the end user is done without any affiliation with or endorsement by Syncrude Canada Ltd. Reliance upon the end user's use of these materials is at the sole risk of the end user.