Abstract
A twin-camera stereoscopic system has been developed to extend conventional high image-density Particle Image Velocimetry (PIV) to three-dimensional vectors on planar domains. The stereoscopic velocimeter performs with extremely high accuracy. Translation tests have yielded errors (rms) of 0.2% of full-scale for the in-plane displacement, and 0.8% of full-scale for the out-of-plane component, both of which agree with the errors predicted by an uncertainty analysis. In addition, modified techniques in hardware and software have enabled the stereoscopic system to perform successfully when acquiring images through a thick liquid layer, wherein previously the aberrations arising due to the liquid-air interface have restricted the use of such systems. With these techniques, the stereoscopic system, in combination with a simple method for image-shifting, is able to accurately measure threedimensional velocity fields in liquids. This is demonstrated by measurements of the helical, three-dimensional flow induced by a rotating disk in glycerine.
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References
Adrian, R. J. 1988: Statistical properties of particle image velocimetry measurements in turbulent flow. Laser anemometry in fluid mechanics, Vol. III, Lisbon: Ladoan-Instituto Superior Técnico, 115–129
Adrian, R. J. 1991: Particle-imaging techniques for experimental fluid mechanics. Ann. Rev. of Fluid Mech. 23, 261–304
Arroyo, M. P.; Greated, C. A. 1991: Stereoscopic particle image velocimetry. Meas. Sci. Technol. 2, 1181–1186
Gauthier, V.; Riethmuller, M. L. 1988: Application of PIDV to complex flows: Measurements of the third component. In VKI-LS 1988–06 “Particle image displacement velocimetry”, Von Karman Institute for Fluid Mechanics, Rhode-Saint-Genèse (Belgium).
Grant, I.; Zhao, Y.; Tan, Y.; Stewart, J. N. 1991: Three component flow mapping: Experiences in stereoscopic PIV and holographic velocimetry. Laser Anemometry Advances and Applications, Vol. 1, (Eds.: Dybbs, A.: Ghorashi, B.), New York: ASME, 365–371
Grobel, M.; Merzkirch, W. 1991: White-light speckle velocimetry applied to plane free convective flow. Exp. Heat Transf. 4, 253–262
Jacquot, P.; Rastogi, P. K. 1981: Influence of out-of-plane deformation and its elimination in white light speckle photography. Optics and Lasers in Engrg. 2, 33–55
Keane, R. D.; Adrian, R. J. 1990: Optimization of particle image velocimeters. Part I: Double pulsed systems, Meas. Sci. Technol. 1, 1202–1215
Kent, J. C.; Mikulec, A.; Rimai, L.; Adamczyk, A. A.; Mueller, S. R.; Stein, R. A.; Warren, C. C. 1989: Observations on the effects of intake-generated swirl and tumble on combustion duration, SAE Tech. Pap. Series No. 892096, Soc. Automot. Eng., USA
Lourenco, L. M.; Krothapalli, A.; Buchlin, J. M.; Riethmuller, M. L. 1986: Aerodynamic and related hydrodynamic studies using water facilities, AGARD-CP-413 (NATO, Brussels), Paper 23
Prasad, A. K.; Adrian, R. J.; Landreth, C. C.; Oflutt, P. W. 1992: Effect of resolution on the speed and accuracy of particle image velocimetry interrogation. Exp. Fluids 13, 105–116
Racca, R. G.; Dewey, J. M. 1988: A method for automatic particle tracking in a three-dimensional flow field. Exp. Fluids 6, 25–32
Schlichting, H. 1979: In: Boundary layer theory (Seventh Ed.), pp. 102–107. New York: McGraw-Hill
Sinha, S. K. 1988: Improving the accuracy and resolution of particle image or laser speckle velocimetry, Exp. Fluids 6, 67–68
Westerweel, J.; Nieuwstadt, F. T. M. 1991: Performance tests on 3-dimensional velocity measurements with a two-camera digital particle-image velocimeter. Laser Anemometry Advances and Applications, Vol. 1, (Eds.: Dybbs, A.; Ghorashi, B.), New York: ASME, 349–355
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Prasad, A.K., Adrian, R.J. Stereoscopic particle image velocimetry applied to liquid flows. Experiments in Fluids 15, 49–60 (1993). https://doi.org/10.1007/BF00195595
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DOI: https://doi.org/10.1007/BF00195595