Effect of drag reducing agent on bubble formation in horizontal liquid cross-flow (original) (raw)

Journal of Visualization, 2015

Abstract

In the present study, experiments were conducted in a rectangular mixing conduit of an effervescent atomizer to quantify the effect of addition of drag reducing agent on bubble formation from an orifice in horizontal cross-flow. Modified bubble formation behavior in horizontal liquid cross-flow after addition of drag reducing agent was investigated. Shadowgraph images of bubbles evolving at an orifice were taken using a high-speed camera; bubble size and velocity were measured. High molecular weight cationic polyacrylamide was used as a drag reducing agent. Increase in the size of bubble with increase in concentration was observed. Particle image velocimetry in the upstream flow with drag reducing agent provided velocity profile and turbulence characteristics showing of the role of mean flow on increasing the bubble size.Graphical abstract

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