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TECHNICAL PAPERS

A Comparison of Spreading Angles of Turbulent Wedges in Velocity and Thermal Boundary Layers

[+] Author and Article Information
S. Zhong, T. P. Chong

School of Engineering, University of Manchester, Manchester M13 9PL, UK

H. P. Hodson

Whittle Lab, Department of Engineering, University of Cambridge, Cambridge CB3 0DY, UK

J. Fluids Eng 125(2), 267-274 (Mar 27, 2003) (8 pages) doi:10.1115/1.1539871 History: Received January 15, 2002; Revised September 16, 2002; Online March 27, 2003
Copyright © 2003 by ASME
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References

Figures

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Schematic diagram of the test section
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Schematic diagram of the heated plate used with temperature-sensitive liquid crystals
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Velocity and pressure gradient distributions for the mild (K1) and strong (K2) pressure gradient cases
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Schematic diagrams showing the lighting and recording arrangement in (a) shear-sensitive and (b) temperature-sensitive liquid crystal tests
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Typical hue-temperature calibration curve for temperature-sensitive liquid crystals
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Turbulent wedge shown by shear-sensitive liquid crystals (raw data)
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Turbulent wedge shown by temperature-sensitive liquid crystals (raw data)
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Contours of color intensity obtained from shear-sensitive liquid crystals, (a) K=0, (b) K=0.25×10−6, (c) K=1.0×10−6
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Contours of heat transfer coefficient obtained from temperature-sensitive liquid crystals, (a) K=0, (b) K=0.25×10−6, (c) K=1.0×10−6
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Spanwise distributions of (a) heat transfer rate from temperature-sensitive liquid crystals and (b) color intensity from shear-sensitive liquid crystals at x=162.5 mm(K=0)
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Linear best-fit of the boundaries of a turbulent wedge (x=162.5 mm,K=0). The symbols represent the edge of the wedge found from the liquid crystal images at a number of streamwise locations.
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Signals from a spanwise array of surface-mounted hot films at x=162.5 mm(K=0)
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Comparison of signals from surface-mounted hot films and a hot-wire at x=162.5 mm(K=0)

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