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Reconstructing three-dimensional wake topology based on planar PIV measurements and pattern recognition analysis

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Abstract

The present study presents a new technique for reconstructing the salient aspects of three-dimensional wake topology based on time-resolved, planar, two-component particle image velocimetry data collected in multiple orthogonal planes. The technique produces conditionally averaged flow field reconstructions based on a pattern recognition analysis of velocity fields. It is validated on the wake of a low-aspect ratio dual step cylinder geometry, consisting of a large diameter cylinder (D) with small aspect ratio (L/D) attached to the mid-span of a small diameter cylinder (d). For a dual step cylinders with D/d = 2, and L/D = 1, numerical and experimental data are considered for ReD = 150 (laminar wake) and for ReD = 2100 (turbulent wake). The results show that the proposed technique successfully reconstructs the dominant periodic wake vortex interactions and can be extended to a wide range of turbulent flows.

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Acknowledgments

The authors gratefully acknowledge the Natural Sciences and Engineering Research Council of Canada (NSERC) for funding of this work.

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Authors and Affiliations

  1. Department of Mechanical and Manufacturing Engineering, University of Calgary, 2500 University Dr NW, Calgary, AB, T2N 1N4, Canada

    C. Morton

  2. Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave W, Waterloo, ON, N2L 3G1, Canada

    S. Yarusevych

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  2. S. Yarusevych
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Correspondence to C. Morton.

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Morton, C., Yarusevych, S. Reconstructing three-dimensional wake topology based on planar PIV measurements and pattern recognition analysis. Exp Fluids 57, 156 (2016). https://doi.org/10.1007/s00348-016-2240-7

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  • DOI: https://doi.org/10.1007/s00348-016-2240-7

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