Fundamentals and Applications of PIV

概要

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Particle-Imaging Velocimetry (PIV) has advanced rapidly with the recent noticeable development of computers and image processors and the development and propagation of flow visualization techniques. The techique of PIV gives information on flow velocity, temperature and density through image analysis of visualized pictures and has been recognized as a strong new measuring tool in thermal and fluid engineering fields including multiphase flows. Its merits are: (1) simultaneous measurement of the whole flow field; (2) easy information processing of the other physical values from its measurement. Such merits are not shared by one point measurement methods such as the Pitot tube, hot wire anemometer and LDV. This article presents not only a general introduction of some methods of PIV but also some details of the fundamentals and applications of typical methods such as laser speckle technique, four consecutive time step particle tracking technique, the cross-correlation method using brigthness distribution patterns and the binary picture cross-correlation method using particle distribution patterns. Applications for these techniques are also suggested.
日本混相流学会の論文