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TECHNICAL PAPERS: Forced Convection

Direct Numerical Simulation of Turbulent Separated Flow and Heat Transfer Over a Blunt Flat Plate

[+] Author and Article Information
Hideki Yanaoka

Department of Intelligent Machines and System Engineering, Hirosaki University, 3 Bunkyo-cho, Hirosaki 036-8561, Japan

Hiroyuki Yoshikawa, Terukazu Ota

Department of Machine Intelligence and Systems Engineering, Tohoku University, 01 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan

J. Heat Transfer 125(5), 779-787 (Sep 23, 2003) (9 pages) doi:10.1115/1.1597623 History: Received August 12, 2002; Revised April 30, 2003; Online September 23, 2003
Copyright © 2003 by ASME
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References

Figures

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Flow configuration and coordinate system
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Variation of reattachment length with Reynolds number
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Isosurface of curvature of equi-pressure surface at T=120 (a) side view; (b) top view
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Isosurface of second invariant of velocity gradient at T=240
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Velocity fluctuations along separated shear layer at z/H=2 (T=240)
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Velocity vectors ((a) and (c)) and temperature contours ((b) and (d)) at T=240
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Power spectrum (a) x-component velocity outside the separated shear layer and (b) z-component one near the leading edge
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Velocity vectors (a) x−y plane at z/H=2 (b) y−z plane at x/H=1 (T=240)
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(a) Correlation of Nusselt number at reattachment point with Reynolds number; (b) Time averaged and rms values of Nusselt number.
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x-component mean velocity (○; Ota—Kon (Re=23400), ▵; Kiya—Sasaki (Re=26000), □; Djilali—Gartshore (Re=50000), –; Present (Re=5000))
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Turbulence intensities of x and y-components of velocity fluctuation (○; Ota—Narita (Re=24000), ▵; Kiya—Sasaki (Re=26000), □; Djilali—Gartshore (Re=5000), –; Present (Re=5000))
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Reynolds shear stress (○; Ota—Narita (Re=24000), ▵; Kiya—Sasaki (Re=26000), –; Present (Re=5000))
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Mean temperature (○; Ota—Kon (Re=23400), –; Present (Re=5000))
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Mean temperature and turbulence intensity of temperature fluctuation
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x and y-components of turbulent heat flux
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Ratio of two components of turbulent heat flux

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