Measurements of two-phase flows with digital image velocimetry
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The experimental flow visualization tool, Particle Image Velocimetry (PIV), is being extended to determine the velocity fields in two-phase fluid flows. In the past few years, the technique has attracted quite a lot of interest. PIV allows fluid velocities across a region of a flow to be measured at a single instant in time. The employed approach utilizes a flow visualization technique in which the instantaneous velocity profile of a given flow field is determined by digitally recording particle or bubble images within the flow over multiple successive video frames and then conducting a completely computational analysis of the data. This paper presents instantaneous velocity measurements in various two-phase flow situations.
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