Abstract
The most common velocity measurement techniques, based on image analysis (PIV), determine the velocity by correlation of a portion of the digitised images and give an Eulerian description of the investigated field. Particle Tracking Velocimetry (PTV), based on the recognition of trajectories of seeding particles, only furnishes an Eulerian description provided that the trajectories are shorter than the characteristics scale of the phenomenon. If particles are tracked for a longer time, a Lagrangian description is obtained. Consequently, in order to successfully evaluate Lagrangian statistics, a long series of single-exposed images has to be acquired. PTV has been utilised in order to analyse different laboratory simulations of flow fields which assume a particular importance in environment applications such as in the flow in a porous media and in the convective atmospheric boundary layer.
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Antonio Cenedese: He received the degree in Mechanical Engineering in 1966 and the degree in Aerospace Engineering in 1969 from the University of Rome “La Sapienza.” Researcher starting from 1969, Associate Professor from 1976 and Professor from 1986. His research field is fluid mechanics, mainly experimental analysis in turbulent flows by means of laser Doppler anemometry and particle image velocimetry. Recently particular attention has been devoted to environmental fluid dynamics.
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Cenedese, A. Eulerian and Lagrangian velocity measurements by means of image analysis. J Vis 2, 73–83 (1999). https://doi.org/10.1007/BF03182553
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DOI: https://doi.org/10.1007/BF03182553