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- 저자 : Peyman Dastyar (검색결과 1 건)
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Peyman Dastyar,Moloud Sadat Salehi,Bahar Firoozabadi,Hossein Afshin 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
In the present study, the formation of surfactant-laden viscous drops in ambient air is experimentallyinvestigated using a high-speed digital camera. The mixtures of 90%, 92.5%, and 95% glycerol by weight inwater containing various concentrations of sodium dodecyl sulfate are chosen as the drop phasefluid. The focus of this work is to investigate the effects of concentration of surfactant dissolved in solutionswith different viscosities, on physical and geometrical parameters related to drop formation process,such as the drop elongation, minimum neck thickness, formation time, and the drop volume. Theformation of satellite drops and the influence of surfactant concentration on their size are also studied. The obtained results indicate that increasing the surfactant concentration and the viscosity of drop phasefluid, slows down the necking process and causes the drop detachment length to increase. The entireprocess of drop formation is divided into two stages, and it was found that adding surfactant to thesolutions has inverse effects on the duration of these two stages. It was also shown that surfactantaddition contributes to an increase in the size of the satellite drop due to generation of Marangonistresses on the surface of the drop's neck.
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