Spatially-resolved characterization of oil-in-water emulsion sprays

When an oil-in-water emulsion is utilized for application in a flat-fan spray, micrometer-sized oil droplets are thought to facilitate hole formation on the spray lamella, leading earlier breakup of sheet and increase resulting droplet sizes. However, prior work has largely focused changes mean or median size, not examined influence emulsions complete size distribution, as well other properties such shape velocity distributions flat fan sprays. This study concerns effects pressure, spatial location, eccentricity, distributions, all which crucial information determining dispersion dynamics during applications. Experiments were conducted with TP6515 nozzle, abovementioned measured using digital inline holography (DIH). Results show that DIH-inferred volumetric (VDSD) span widely from sub-100 ?m over 2 mm size. The results suppression smaller droplets, while VDSD relatively insensitive increasing volume fraction beyond critical level. DIH consistent observation ligaments observed only regions single-phase water sprays, break up more violently than larger ligaments. It these suppressed emulsion, yield sub-millimeter some sizes approaching dimensions, corresponding driftable agricultural settings. Interestingly, generally decreases eccentricity significantly at center edge fan. We attribute this decrease lamella thickness thus characteristic shrinkage rates, observations high speed shadowgraphs. In instances, have higher velocities equivalent sized droplets. action process reduced surface energy generation (larger droplets), dissipation emulsions, increased translational after process. Therefore, it appears simultaneously suppresses small increases velocity, hence penetration application.