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Three-dimensional Voronoi imaging methods for the measurement of near-wall particulate flows

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Spinewine, Benoît [UCL] Capart, Hervé Larcher, Michele Zech, Yves [UCL]

A set of stereoscopic imaging techniques is proposed for the measurement of rapidly flowing dispersions of opaque particles observed near a transparent wall. The methods exploit projective geometry and the Voronoi diagram. They rely on purely geometrical principles to reconstruct 3D particle positions, concentrations, and velocities. The methods are able to handle position and motion ambiguities, as well as particle-occlusion effects, difficulties that are common in the case of dense dispersions of many identical particles. Fluidization cell experiments allow validation of the concentration estimates. A mature debris-flow experimental run is then chosen to test the particle-tracking algorithm. The Voronoi stereo methods are found to perform well in both cases, and to present significant advantages over monocular imaging measurements.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2003
Language Anglais
Journal information "Experiments in Fluids : experimental methods and their applications to fluid flow" - Vol. 34, no. 2, p. 227-241 (2003)
Peer reviewed yes
Publisher Springer-verlag (New York)
issn 0723-4864
e-issn 1432-1114
Publication status Publié
Affiliation UCL - FSA/AUCE - Département d'architecture, d'urbanisme et de génie civil environnemental
Links
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Bibliographic reference Spinewine, Benoît ; Capart, Hervé ; Larcher, Michele ; Zech, Yves. Three-dimensional Voronoi imaging methods for the measurement of near-wall particulate flows. In: Experiments in Fluids : experimental methods and their applications to fluid flow, Vol. 34, no. 2, p. 227-241 (2003)
Permanent URL http://hdl.handle.net/2078.1/41156