کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994868 1458483 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rising behavior of single bubble in infinite stagnant non-Newtonian liquids
ترجمه فارسی عنوان
رفتار افزایش حباب تک در مایعات غیر نیوتنی راکد می شود
کلمات کلیدی
مایعات غیر نیوتنی، کربوکسی متیل سلولز، حباب تک آزمایش تجربی، رفتار افزایش یافته،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
This work is an experimental study of the rising behavior of single air bubbles in infinite stagnant non-Newtonian liquids. Aqueous solutions of carboxymethyl cellulose (CMC) are selected to study the effect of rheological properties. The high speed photography is employed to record the bubble motion in CMC solutions. The bubble size, rising trajectory, bubble shape and velocities are determined by digital image processing technique. As expected, the rheological properties have great influence on the rising behavior of single bubble. In the less concentrated CMC solutions, the bubble rising process can be divided into three stages according to spatial evolution of bubble shape. The deformation changes the trajectories of rising bubbles and bubble hydrodynamics. As the solution concentration increases, the transitional stage gradually disappears. In the most concentrated CMC solution, the first continuous shape flattening stage is directly followed by a rising process with bubble shape basically constant, the rectilinear path and constant rising velocity. Dimensional analysis is performed to formulate a general dimensionless correlation for the deformation and motion of bubbles in infinite liquids by considering the rheological properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 95, October 2017, Pages 84-90
نویسندگان
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