PIV Measurements of Turbulent Flow in a Channel with Solid or Perforated Ribs

Lei Wang, Mirko Salewski, Bengt Sundén

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    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. ©2010 ASME
    Original languageEnglish
    Title of host publicationProceedings
    Volume1
    PublisherAmerican Society of Mechanical Engineers
    Publication date2011
    Pages1995-2003
    ISBN (Print)978-0-7918-4948-4
    DOIs
    Publication statusPublished - 2011
    EventASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels (FEDSM2010) - Montreal (CA), 1-5 Aug
    Duration: 1 Jan 2010 → …

    Conference

    ConferenceASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels (FEDSM2010)
    CityMontreal (CA), 1-5 Aug
    Period01/01/2010 → …

    Keywords

    • Plasma processing

    Cite this

    Wang, L., Salewski, M., & Sundén, B. (2011). PIV Measurements of Turbulent Flow in a Channel with Solid or Perforated Ribs. In Proceedings (Vol. 1, pp. 1995-2003). American Society of Mechanical Engineers. https://doi.org/10.1115/FEDSM-ICNMM2010-30015