Time-Serial analysis on Gas-Liquid Two-Phase Bubbly Flow using POD

摘要

Bubbly flows are complicated flows because bubbles are deformable and the bubble-bubble interactions work in local area including a lot of bubbles. Such flow occurred turbulence in liquid phase by each bubble is called "pseudo turbulence". A PIV is most effective to measure complicated bubbly flow because of multi-dimensional measurement. Recently Dynamic PIV system which is consisted of high-speed camera and high-repetition laser is developed, and it is possible to capture time-serial images with higher resolution. In this paper POD (Proper Orthogonal Decomposition) is described as post-processing of bubbly flow. We confirmed it has the effect of temporal-spatio smooth filter.