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TECHNICAL PAPERS

Large Eddy Simulation of Turbulent Wake Behind a Square Cylinder With a Nearby Wall

[+] Author and Article Information
Tong-Miin Liou

College of Engineering, Feng Chia University, Taichung, Taiwan 407, ROC

Shih-Hui Chen, Po-Wen Hwang

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC

J. Fluids Eng 124(1), 81-90 (Oct 15, 2001) (10 pages) doi:10.1115/1.1445797 History: Received November 16, 1999; Revised October 15, 2001
Copyright © 2002 by ASME
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References

Figures

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Coordinate system and schematic drawing of the computational domain and boundary conditions
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Streamwise and transverse total fluctuation intensity variation along the centerline downstream of the free-standing cylinder for Re=2.2×104
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Phase-averaged transverse velocity variation along the centerline behind the free-standing cylinder at two selected phases (t/tcyc=0.05 and 0.45) for Re=2.2×104
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Nondimensionalized phase-averaged spanwise vorticity contours at five selected phases (t/tcyc=0.05, 0.25, 0.45, 0.65, and 0.85) for C/H=0.75 and Re=2.2×104
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Trajectory of vortex peak and variation of spanwise vorticity peak value with x/H for C/H=0.75 and Re=2.2×104
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Time history of spanwise vorticity peak along the streamwise direction for C/H=0.75 and Re=2.2×104
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Streamwise time-averaged Nusselt number variation along the wall on z/H=0 plane for C/H=0.75 and Re=2.2×104
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Instantaneous secondary velocity vector plot at x/H=4.0 for C/H=0.75 and Re=2.2×104
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Nondimensionalized phased-averaged contours of the streamwise periodic 〈u′pu′pp/Uref2 and random 〈u′su′sp/Uref2 fluctuations at a selected phase t/tcyc=0.45 for C/H=0.75 and Re=2.2×104
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(a) Streamwise time-averaged mean velocity variation along the centerline behind the free-standing cylinder for Re=2.2×104 (comparison with RANS). (b) Streamwise time-averaged mean velocity variation along the centerline behind the free-standing cylinder for Re=2.2×104 (comparison with other LES)
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(a) Power spectra of fluctuating lift coefficient for cylinder with and without a nearby wall. (b) Power spectra of transverse fluctuating velocity component with and without SGS model. (c) Power spectra of transverse fluctuating velocity component at different locations.

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