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Title:Conditional velocity and reynolds stresses in plane turbulent shear layer
Author(s):Tung, Andrew T.C.; Adrian, Ronald J.; Jones, Barclay G.
Subject(s):Conditional Velocity
Reynolds Stresses
Plane Turbulent Shear Layer
Abstract:The properties of conditional averages in which the conditional event has the form {v < u(x,t) < v + dv} have been studied for isotropic turbulence and for anisotropic turbulence in a plane high Reynolds number shear layer with 2:1 velocity ratio. In isotropic turbulence it is shown that a linear estimate of the form < ui (x + r,t) | u(x,t) > = Aij(r)uj(x,t) is the dominant term in a power series expansion of the conditional average. It is a good approximation for probable values of the velocity fluctuation, and it predicts a vortex ring structure. In the shear layer, conditional averages of the velocity component u(x + r,t) and v(x + r,t) and the Reynolds stresses uv(x + r,t), u2(x + r,t), v2(x + r,t) have been measured given the values of u(x,t) and v(x,t) using two X-wire probes. Comparison of the conditional velocity with its linear estimate shows good agreement, provided the correlation function used in linear estimate is accurate.
Issue Date:1987-01
Publisher:Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report:TAM R 483
1987-6001
Genre:Technical Report
Type:Text
Language:English
URI:http://hdl.handle.net/2142/112224
ISSN:0073-5264
Sponsor:National Science Foundation 87/01 NSF ATM 77 22936 87/01
Rights Information:Copyright 1987 Board of Trustees of the University of Illinois
Date Available in IDEALS:2021-11-04


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  • Technical Reports - Theoretical and Applied Mechanics (TAM)
    TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.

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