A Novel Three-Dimensional PTV Algorithm Composed by Efficient Space and Timewise Particle Identification,

Abstract : A new efficient algorithm consisting of a stereo-pair matching and a particle-tracking is developed for three-dimensional particle tracking velocimetry. In the former procedure, three-dimensional coordinates of particles can be determined efficiently by identifying particles between pictures taken simultaneously from multiple directions. The latter one is a three-dimensional binary correlation method, which can identify particles between two sequential pictures by evaluating similarity between two local patterns of three-dimensionally distributed particles. Performances of the new method such as the measurement accuracy of coordinates of particles, the reliability of estimated particle-pairs, and the analyzing speed are examined. (Author)