The effect of dynamic surface tension and high shear viscosity on droplet size distributions produced by a flat fan nozzle

摘要

Viscosity and surface tension are known to have a significant impact on liquid breakup into droplets. However, the droplet size data reported by many authors is more irregular than the data on physical properties. In this study, recent improvements to existing techniques were used to obtain the dynamic surface tension at young surface ages and viscosity at high shear rates, which more closely represents those conditions typically encountered at nozzle orifices. The surface tension and viscosity were measured for a selection of surfactants mixed with water, using an oscillating jet technique and a high shear viscometer, respectively.