Research Article
Jan 1963
Turbulent Diffusion and Anemometer Measurements
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VIEW THE REPLYAuthors: L. V. Baldwin and William R. MichelsenAuthor Affiliations
Publication: Transactions of the American Society of Civil Engineers
Volume 128, Issue 1
Abstract
Theoretical prediction of diffusion in homogeneous turbulent fields from the Taylor theory of diffusion by continuous movements requires knowledge of the Lagrangian turbulent velocity correlation coefficient. Although a direct theoretical connection between the Lagrangian and Eulerian correlation coefficients has not been found, it is shown that an empirical relation can be established. Eulerian correlation coefficients from hot-wire anemometer measurements are compared with Lagrangian correlation coefficients derived from diffusion measurements in a homogeneous turbulent flow. From this comparison, a relationis found that permits a direct prediction of turbulent diffusion from hotwire (Eulerian) measurements of the turbulent field. Some measurements of a mixed space-time Eulerian correlation coefficient are described, and a possible direction of further research is presented.
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© 1963 American Society of Civil Engineers.
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Published in print: Jan 1963
Published online: Feb 10, 2021
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L. V. Baldwin
Assoc. Prof., Colorado State Univ., Fort Collins, Colo.
William R. Michelsen
Chf., Electrostatic Propulsion Branch, NASA-Lewis Research Center, Cleveland, Ohio.
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