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International Symposium on Imaging in Transport Processes.
May, 25-29, 1992, Athens, Greece

DOI: 10.1615/ICHMT.1992.IntSympImgTranspProc


ISBN Print: 978-1-56700-012-2

Image Processing by Particle Tracking
QUANTITATIVE IMAGING OF TRANSPORT IN FLUIDS WITH DIGITAL PARTICLE TRACKING VELOCIMETRY

pages 297-308
DOI: 10.1615/ICHMT.1992.IntSympImgTranspProc.280
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RÉSUMÉ

The efficiency of transport and exchange of energy, heat and mass is an important issue in nature. Turbulent transport dominates on the large scales in the Atmosphere and the Ocean, while diffusive transport mechanisms have most influence on small scales i.e. very close to the free water surface. There, the viscous boundary layer in water causes the main resistance of transport across the air/sea interface. Accurate knowledge about the flow field close to the surface is required in order to understand these mechanisms and the influence of the wave motion.
The application of classical point measurement techniques like Laser Doppler Velocimetry (LDV) is arduous due to the irregular moving water surface and the accurate interpretation of the measurements remains a task hardly to solve [1, 2]. Extended measurement techniques for particle laden fluid flows have been applied using imaging techniques such as the Laser Speckle Velocimetry (LSV) and Particle Imaging Velocimetry (PIV) [5]. These methods provide a local averaged velocity in a two dimensional (2D) area at a certain instant using the displacement of particles acquired from a multiply exposed image or image pairs.

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