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Lagrangian and Eulerian statistics obtained from direct numerical simulations of homogeneous turbulenceDirect numerical simulation is used to study dispersion in decaying isotropic turbulence and homogeneous shear flow. Both Lagrangian and Eulerian data are presented allowing direct comparison, but at fairly low Reynolds number. The quantities presented include properties of the dispersion tensor, isoprobability contours of particle displacement, Lagrangian and Eulerian velocity autocorrelations and time scale ratios, and the eddy diffusivity tensor. The Lagrangian time microscale is found to be consistently larger than the Eulerian microscale, presumably due to the advection of the small scales by the large scales in the Eulerian reference frame.
Document ID
19910035662
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Squires, Kyle D.
(Stanford Univ. CA, United States)
Eaton, John K.
(Stanford University CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Physics of Fluids A
Volume: 3
ISSN: 0899-8213
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
91A20285
Funding Number(s)
CONTRACT_GRANT: NSF MEA-83-51417
Distribution Limits
Public
Copyright
Other

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