Abstract
Three-dimensional PIV, which can measure the three-dimensional distribution of three components of fluid velocity, was developed in this study. This method utilizes the fact that the intensity of scattered light from a particle is proportional to the intensity of laser beam at the particle position. Making the intensity ratio of two laser beams as a function of position realizes the determination of particle position from the intensity ratio of scattering of the two beams. The velocity vectors can be measured by using the cross-correlation of thus measured particle distributions. The developed method was applied to flow around drops and its feasibility was confirmed through the measured results.
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