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TECHNICAL PAPERS

Rotating Effect on Fluid Flow in Two Smooth Ducts Connected by a 180-Degree Bend

[+] Author and Article Information
Tong-Miin Liou

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

Chung-Chu Chen

Microsystem Laboratory, Industrial Technology Research Institute, Hsin-Chu, Taiwan, ROC e-mail: 890079@itri.org.tw

Meng-Yu Chen

Department of Power Mechanical Engineering, National Tsing Hua University, Hsin-Chu, Taiwan, ROCe-mail: d853708@oz.nthu.edu.tw

J. Fluids Eng 125(1), 138-148 (Jan 22, 2003) (11 pages) doi:10.1115/1.1522413 History: Received March 01, 2000; Revised June 17, 2002; Online January 22, 2003
Copyright © 2003 by ASME
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References

Figures

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Sketch of configuration, coordinate system, and dimensions of test section
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Schematic drawing of overall experimental system
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Streamwise mean velocity and turbulence intensity profiles at X*=10 station of the first pass in the (a) Z*=−0.5 and (b) Y*=0 planes for Re=10,000 and Ro=0
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Streamwise mean velocity and turbulence intensity profiles at X*=10 station of the first pass in the Z*=−0.5 plane for Re=10,000 with various Ro
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Evolution of streamwise mean velocity profile in the Z*=±0.50 planes of the first and second passes for (a) Ro=0 (Liou et al., 20) and (b) Ro=0.05
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Radially inward evolution of U/Ub profile within 2DH immediately after the turn for (a) Ro=0.08 and (b) Ro=0.15
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Variation of separation bubble length with rotation number
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(a) Spanwise variations of streamwise mean velocity and turbulence intensity profiles in the first pass for Ro=0.15. (b) Spanwise variations of streamwise mean velocity and turbulence intensity profiles in the second pass for Ro=0.15.
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Variation of dimensionless wall static pressure with X*
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Cross-stream secondary flow patterns in the midturn (Z**=0) for (a) Ro=0, (b) Ro=0.08, and Ro=0.15 at Re=10,000 (view from downstream side)
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Flow patterns of two cross sections (Z*=−0.5 and Z*=0.5) inside the turn for Ro=0.08 and Ro=0.15 at Re=10,000 (view from downstream side)
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Dimensionless turbulent kinetic energy contours of three cross sections (Z*=−0.5,Z**=0, and Z*=0.5) inside the turn for Ro=0.08 and Ro=0.15 at Re=10,000 (view from downstream side)
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Variation of Nusselt number ratio, dimensionless skewness index, magnitude of secondary-flow velocity, and turbulent kinetic energy with Ro for Re=104
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Effects of rotation on radial distributions of Nu/Nu0,k/Ub2,|U|/Ub, and V/Ub at Z**=0 for Re=10,000 (LDV measurements performed at 2-mm distance away from the leading (Y*=−1) or trailing (Y*=1) walls)

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