Hydrodynamic Study of a Rising Bubble in the Presence of Cetyltrimethylammonium Bromide Surfactant
- سال انتشار: 1402
- محل انتشار: Iranian Journal of Chemistry and Chemical Engineering، دوره: 42، شماره: 2
- کد COI اختصاصی: JR_IJCCE-42-2_012
- زبان مقاله: انگلیسی
- تعداد مشاهده: 72
نویسندگان
Karimi, Safoora +; Abiri, Ana; Shfiee, Mojtaba Department of Chemical Engineering, Jundi-Shapur University of Technology, Dezful, I.R. IRAN
Karimi, Safoora +; Abiri, Ana; Shfiee, Mojtaba Department of Chemical Engineering, Jundi-Shapur University of Technology, Dezful, I.R. IRAN
Karimi, Safoora +; Abiri, Ana; Shfiee, Mojtaba Department of Chemical Engineering, Jundi-Shapur University of Technology, Dezful, I.R. IRAN
چکیده
The performance of surfactants especially in two-phase systems, depends on their type, Hydrophile-Lipophile Balance (HLB) number, concentration, and whether the surfactant is ionic or non-ionic. The current work was conducted to study the effect of the presence of Cetyltrimethylammonium Bromide (CTAB), a cationic surfactant, in air-water systems. Thus, the behavior of a single air bubble rising in aqueous CTAB solutions was studied experimentally. The independent test variables are solution concentration (۰.۴-۱.۶mM) and bubble diameter (۳.۵-۴.۶mm). The effect of these variables on rising velocity, bubble shape, and drag coefficient has been studied. Due to the importance of the drag coefficient in two-phase fluid, the effect of Reynolds number, Eötvös number, and aspect ratio on it has also been evaluated. Experiments have been performed at high Reynolds numbers (۸۵۰< Re< ۱۰۰۰), which are obtained by increasing the surfactant concentration. The results showed that the selected ionic surfactant had a more tangible effect on bubble behavior than nonionic surfactants. Moreover, there is no noticeable difference in the behavior of the bubble rising at concentrations above and below of Critical Micelle Concentration (CMC) of CTAB, which can be attributed to its high aggregation number compared to other surfactants.کلیدواژه ها
Drag coefficient, Bubble rising, Cetyltrimethylammonium bromide, Equivalent diameter, surfactant concentration, Terminal velocityاطلاعات بیشتر در مورد COI
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