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TECHNICAL PAPERS

The Dependence of the Time Scale of Relative Lagrangian Motion on the Initial Separation

[+] Author and Article Information
J. C. H. Fung

Department of Mathematics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

J. Appl. Mech 65(1), 204-208 (Mar 01, 1998) (5 pages) doi:10.1115/1.2789027 History: Received December 05, 1996; Revised July 25, 1997; Online October 25, 2007

Abstract

Kinematic simulation of homogeneous isotropic turbulence are used to compute Lagrangian statistics of turbulence and, in particular, its time scales. The computed pseudo-Lagrangian velocity autocorrelation functions 11L(l, t) compare well with theory for a small initial separation l and short time t. We also demonstrate the feasibility of using kinematic simulation as a means of constructing Lagrangian statistics.

Copyright © 1998 by The American Society of Mechanical Engineers
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