RT Journal Article ID 7bc3f401083a5c9a A1 Trainer, Daniel T1 EFFECTS OF FLOW PATTERN ON THE BREAKUP LENGTH OF CIRCULAR AIR-ASSISTED WATER JETS JF Atomization and Sprays JO AAS YR 2018 FD 2018-11-06 VO 28 IS 9 SP 763 OP 777 K1 jet breakup K1 flow pattern K1 two-phase jet K1 co-current downward two-phase flow AB The effects of flow pattern on the breakup length of circular air-assisted water jets are investigated by varying, independently from other flow parameters, the air-water flow patterns within small diameter tubes. A Y-type mixer and a coaxial needle-type mixer are used to generate air-assisted jets. Maps of the flow pattern transitions are presented using both mixer types. Liquid-only and air-assisted jets in the Rayleigh and first wind-induced breakup regimes are observed. Bubbly, bubbly-slug, slug, and slug-annular flow patterns are observed. Disperse-bubbly flow is shown to result in longer jet breakup length when compared to other flow patterns having the same flow parameters. High-speed visualization of jet breakup reveals how the flow pattern influences the dominant jet breakup mechanism. Linear jet stability is used to predict the jet breakup length based on the liquid Weber number, Ohnesorge number, and volumetric void fraction when the flow pattern is disperse-bubbly and bubbly-slug. PB Begell House LK https://www.dl.begellhouse.com/journals/6a7c7e10642258cc,1acedbac185a6298,7bc3f401083a5c9a.html