Optical Flow Technique used to Characterise the Flow inside Different Cavities Interacting with a Boundary Layer
by
Afif Elcafsi
LIMSI-CNRS, B.P. 133 91403 Orsay FRANCE
Coauthors: Alecsandra Rambert, Pierre Gougat

An Optical Flow technique based on the use of Dynamic Programming has been applied to Particle Image Velocimetry yielding a significant increase in the accuracy and spatial resolution of the velocity field. We applied this technique to characterize the interaction between a laminar boundary layer and cavities of different shape factor.

The experimental characterisation of the interaction between a boundary layer and a cavity was developed in order to valid a three dimensional computation code based on the L.E.S. method (Large Eddies Simulation). The main application of this work is the study of the pollutant transport and dispersion in a street canyon.

Date received: April 6, 1999

Copyright © 1999 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cacp-62.