Three-Dimensional Stereo Measurements in Bubbly Pipe Flows With Particle Tracking Velocimetry

In a two-phase bubbly flow, the continuous phase velocity field can be captured using standard PIV techniques, and the gas phase configuration can be determined using, for example, a shadow technique. If the PIV system includes a three-dimensional shadow PIV measurement set up, the bubble locations in the standard PIV measurements can be determined. Then, the bubble images are removed, and a typical anlysis of the liquid phase can be performed. An experimental set up that combines the traditional PIV technique with a shadow technique will be described and sample PIV images will be analyzed to demonstrate an advanced velocity vector analysis method in a two-phase bubbly flow system.