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Proceedings Paper

Analytical and experimental investigations of dual-plane PIV
Author(s): Markus Raffel; Jerry Westerweel; Christian Willert; Mory Gharib; Juergen Kompenhans
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Paper Abstract

In its 'classical' form particle image velocimetry (PIV) extracts two components of the flow velocity vector by measuring the displacement of tracer particles within a double-pulsed laser light sheet. The method described in this paper is based on the additional recording of a third exposure of the tracer particles in a parallel light sheet, which is slightly displaced with respect to the first one. The particle images resulting from these three exposures are stored on separate frames. The locations of the correlation peaks, as obtained by cross-correlation methods, are used to determine the projections of the velocity vectors onto the plane between both light sheets. In the manner described below, the amplitudes of these peaks are used to obtain information about the velocity component perpendicular to the light sheet planes. The mathematical background of this method is described in the paper. Numerical simulations show the influence of the main parameters (e.g. light sheet thickness, light sheet displacement and out-of-plane component) on the resolution and reliability of the new method. Two different recording procedures and their results will be shown to demonstrate the ease of operation when applying this technique to liquid flows.

Paper Details

Date Published: 29 September 1995
PDF: 12 pages
Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); doi: 10.1117/12.221511
Show Author Affiliations
Markus Raffel, DLR (Germany)
Jerry Westerweel, Delft Univ. of Technology (Netherlands)
Christian Willert, DLR (Germany)
Mory Gharib, California Institute of Technology (United States)
Juergen Kompenhans, DLR (Germany)

Published in SPIE Proceedings Vol. 2546:
Optical Techniques in Fluid, Thermal, and Combustion Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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