A vortex model to relate eulerian and lagrangian “ turbulent” velocity fields
作者:
T. E. Base,
P. O. A. L. Davies,
期刊:
The Canadian Journal of Chemical Engineering
(WILEY Available online 1974)
卷期:
Volume 52,
issue 1
页码: 11-16
ISSN:0008-4034
年代: 1974
DOI:10.1002/cjce.5450520103
出版商: Wiley Subscription Services, Inc., A Wiley Company
数据来源: WILEY
摘要:
AbstractThe phenomenon of turbulent diffusion was studied by using computed models. Free pseudo‐turbulent fluid flow was simulated on a digital computer by ensembles of randomly positioned moving and interacting vortices to represent the eddy structure of the turbulence. A vortex model, which had statistical values corresponding to a measured real flow in an Eulerian frame of reference, was then obtained. By considering the motion of a particular vortex or a fluid particle in the computed pseudo‐turbulent flow it was possible to determine measurements in a Lagrangian frame of reference. Estimates of the mean square lateral excursions of a marked particle were obtained and finally the Lagrangian auto correlation was compared with the auto correlation in a moving frame of refere
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