کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
659921 | 1458098 | 2012 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of soluble anionic surfactants on rise velocity and mass transfer at single droplets in systems with Marangoni instabilities
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The toluene/acetone/water system without surfactants shows strong Marangoni instabilities with distinct fluid dynamics and enhanced mass transfer. The present study investigates the impact of an anionic surfactant (SDS) on rise velocity and mass transfer both in the spherical and the oscillating droplet regime in time resolved measurements. Results are compared with the respective pure system and with correlations from literature. Velocity measurements reveal that the smaller the droplets are the lower is the surfactant concentration where the terminal velocity of the corresponding rigid sphere is attained. Mass transfer measurements show that mass transfer is still significantly enhanced by Marangoni convection although the surfactant concentration was believed to be high enough to hinder interfacial movement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 5â6, February 2012, Pages 1561-1573
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 5â6, February 2012, Pages 1561-1573
نویسندگان
M. Wegener, A.R. Paschedag,