3D-PTV measurements in a plane Couette flow
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348_2011_Article_1256.pdf
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Author(s)
Krug, Dominik
Lüthi, Beat
Holzner, Markus
Tsinober, Arkady
Seybold, Hansjorg
Date Issued
January 2012
Journal
Experiments in Fluids
Publisher
Springer-Verlag
Citation
Krug, Dominik et al. “3D-PTV Measurements in a Plane Couette Flow.” Experiments in Fluids 52.5 (2012): 1349–1360.
Version
Author's final manuscript
Abstract
Genuine plane Couette flow is hard to realize experimentally, and no applications of modern spatially resolving measurement techniques have been reported for this flow so far. In order to resolve this shortcoming, we designed and built a new experimental facility and present our first results here. Our setup enables us to access the flow via 3D particle tracking velocimetry and therefore to obtain truly three-dimensional flow fields for the first time experimentally in plane Couette flow. Results are analyzed in terms of basic flow properties, and a clear distinction of flow regimes (laminar for Re < 320, transitional for 320 < Re < 400, and turbulent when Re > 400) could be made. Comparison with DNS data shows good agreement in the turbulent regime and builds trust in our data. Furthermore, vortical coherent structures are studied in detail with the additional help of kalliroscope imaging, and the typical vortex spacing is determined to be roughly one gap width. As a noteworthy result, we find that the onset of the turbulent regime coincides with the range of Reynolds numbers at which a distance of 100 wall units is comparable to the gap width.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1007/s00348-011-1256-2
