A New Aspect on PIV for Gas-Liquid Two-Phase Flow Analysis

Many types of algorithms for PIV and PTV have been developed from simple cross-correlation method to binary image cross-correlation method, Delaunay tessellation method, velocity gradient tensor method, and recursive cross-correlation method, etc. In parallel, useful post-processing schemes for PIV/PTV such as ellipsoidal equation method and inverse analysis method were proposed so that detailed flow structure could be evaluated. Most algorithms have been verified with the aid of numerical simulation techniques based on the fundamental equation of Navier-Stokes, equations of continuity. Recently some new PIV-CFD hybrid systems have been proposed. This paper concerns with such a history of the research and future possibilities for further advance in the PIV/PTV and the new hybrid systems which are applied to gas-liquid two-phase flow analysis