Coherent forward scattering particle-image velocimetry: application of Poisson's spot for velocity measurements in fluids

Ben Ovryn; Edward A. Hovenac

doi:10.1117/12.163718

2 December 1993 Coherent forward scattering particle-image velocimetry: application of Poisson's spot for velocity measurements in fluids

Ben Ovryn, Edward A. Hovenac

Author Affiliations +

Proceedings Volume 2005, Optical Diagnostics in Fluid and Thermal Flow; (1993) https://doi.org/10.1117/12.163718
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Conventionally, particle image velocimetry techniques utilize a laser light sheet oriented perpendicular to the viewing direction to illuminate tracer particles. In this SPIE proceedings paper, initial results are presented based upon illuminating the region of interest with partially coherent light from behind the particle and viewing the forward scattered diffraction pattern using video microscopy with a CCD array. There are several distinct advantages to this arrangement, including: easily identified particle centroids and the possibility of simultaneously obtaining the fluid velocity in different planes perpendicular to the viewing direction without moving the imaging system or illumination source. This technique will be referred to as Coherent Forward Scattering Particle Image Velocimetry.

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Ben Ovryn and Edward A. Hovenac "Coherent forward scattering particle-image velocimetry: application of Poisson's spot for velocity measurements in fluids", Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); https://doi.org/10.1117/12.163718

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