Predictions of a Turbulent Separated Flow Using Commercial CFD Codes

[+] Author and Article Information
Gianluca Iaccarino

Center for Turbulence Research, Stanford University, Stanford, CA 94305-3030

J. Fluids Eng 123(4), 819-828 (May 21, 2001) (10 pages) doi:10.1115/1.1400749 History: Received October 16, 2000; Revised May 21, 2001
Copyright © 2001 by ASME
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Asymmetric diffuser geometry
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Computational grid—detail of the channel-diffuser connection
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Convergence history (L norm). Left column: v′2−f model; right column: low-Reynolds k-ε model. (a) CFX v4.3; (b) fluent v5.3; (c) star-CD v3.1.
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Mean streamwise velocity—CFX. Contour levels Min=−0.05;max=1.0,Δ=0.05 (dashed lines negative values).
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Streamwise velocity profiles
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Turbulent kinetic energy profiles
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Skin friction distribution on the diffuser walls. Left column: v′2−f model; right column: low-Reynolds k-ε model. (a) Lower wall; (b) Upper wall.
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Grid convergence and differencing scheme dependency—Fluent low-reynolds k-ε model
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Results using a differential Reynolds-stress model and non-linear eddy viscosity model




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