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Proceedings Paper

New particle tracking velocimetry
Author(s): Antonio Baldassarre; Maurizio De Lucia; Paolo Nesi; Francesca Rossi
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Paper Abstract

Particle Image Velocimetry (PIV) is a non-intrusive optical measurement method to capture flow velocity fields. It provides the simultaneous visualization of the two-dimensional streamline pattern in unsteady flows and the quantification of the velocity field over a plane. To reveal the flow motion, the flow is seeded by small scattering particles. The instantaneous fluid velocities are evaluated by recording the images of tracers, suspended in the fluid and traversing a light sheet. A PIV system consists of seeding particles, illumination unit, image acquisition system, and a processing computer with appropriate software. For industrial applications a standard PIV system is not suitable, for its costs, sizes and needs of specialized users and work areas. In this paper, the realization of a new PIV system is described and compared with the standard PIV. The solution proposed is a Continuous PIV, CPIV, system: with respect to a standard PIV, it is composed of a continuous laser light source, a low cost standard CCD camera. A specifically new image-processing algorithm has been developed. This studies the gray level distribution in the particle trace image, and indicates those particles moving with an out-of-plane velocity vector component and the measure with a limited error.

Paper Details

Date Published: 21 September 1999
PDF: 12 pages
Proc. SPIE 3824, Optical Measurement Systems for Industrial Inspection, (21 September 1999); doi: 10.1117/12.364257
Show Author Affiliations
Antonio Baldassarre, Univ. of Florence (Italy)
Maurizio De Lucia, Univ. of Florence (Italy)
Paolo Nesi, Univ. of Florence (Italy)
Francesca Rossi, Univ. of Florence (Italy)

Published in SPIE Proceedings Vol. 3824:
Optical Measurement Systems for Industrial Inspection
Malgorzata Kujawinska; Wolfgang Osten, Editor(s)

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