Particle image velocimetry measurements are performed in a channel with periodic ribs on one wall. We investigate the flow around two different rib configurations: solid and perforated ribs with a slit. The ribs obstruct the channel by 20% of its height and are arranged 10 rib heights apart. For the perforated ribs, the slit height is 20% of the rib height, and the open-area ratio is 16%. We discuss the flow in terms of mean velocity, streamlines, vorticity, turbulence intensity, and Reynolds shear stress. We find that the recirculation bubbles after the perforated ribs are significantly smaller than those after the solid ribs. The reattachment length after perforated ribs is smaller by about 45% compared with the solid ribs. In addition, the Reynolds shear stresses around the perforated ribs are significantly smaller than in the solid rib case, leading to a reduction of the pressure loss in the perforated rib case.
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4948-4
PROCEEDINGS PAPER
PIV Measurements of Turbulent Flow in a Channel With Solid or Perforated Ribs Available to Purchase
Mirko Salewski,
Mirko Salewski
Technical University of Denmark, Roskilde, Denmark
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Bengt Sunde´n
Bengt Sunde´n
Lund University, Lund, Sweden
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Lei Wang
Lund University, Lund, Sweden
Mirko Salewski
Technical University of Denmark, Roskilde, Denmark
Bengt Sunde´n
Lund University, Lund, Sweden
Paper No:
FEDSM-ICNMM2010-30015, pp. 1995-2003; 9 pages
Published Online:
March 1, 2011
Citation
Wang, L, Salewski, M, & Sunde´n, B. "PIV Measurements of Turbulent Flow in a Channel With Solid or Perforated Ribs." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C. Montreal, Quebec, Canada. August 1–5, 2010. pp. 1995-2003. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-30015
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