Study of Turbulent Concentration Fluctuations

Abstract

The literature on turbulent concentration in atmospheric smoke plumes is reviewed and new models developed for predicting the statistical characteristics of these fluctuations, including the mean and the variance. A method for estimating the integral time scale for concentration fluctuations is suggested, and it is shown how this time scale can be used to calculate the effects of averaging and sampling times on the total variance. The spectra and cross-spectra of concentration and wind speed fluctuations are investigated using data from several field and laboratory experiments, leading to generalizations regarding spectral shape and phase relations between the concentration and wind speed time series. Keywords: Turbulence, Diffusion, Concentration fluctuations, Spectral analysis.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1988
Accession Number
ADA198526

Entities

People

  • Steven R. Hanna

Tags

Communities of Interest

  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Atmospheric Motion
  • Boundary Layer
  • Computer Programs
  • Computers
  • Corporations
  • Data Science
  • Databases
  • Dispersions
  • Factor Analysis
  • Ground Level
  • Information Science
  • Measurement
  • Meteorology
  • Military Research
  • Scientists
  • Turbulence
  • Wind Velocity

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Chemistry (specifically Chemical Fluorescence)
  • Statistical inference.