کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
655868 1457660 2010 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling bubbly flow and its transitions in vertical annuli using population balance technique
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Modelling bubbly flow and its transitions in vertical annuli using population balance technique
چکیده انگلیسی

Bubbly flow and its transitions in vertical annuli is studied using population balance technique. Bubble breakup and coalescence is accounted separately to track the evolution of the bubble size during the simultaneous flow of gas and liquid. The conventional two-fluid model is used to simulate the hydrodynamics. The model enables the prediction of voidage profile at any axial location. Presence of peak in the void distribution at the walls of the annulus, center of the annulus and both at walls and centers is observed depending on the phase superficial velocities. Further, transition from bubbly to slug and bubbly to dispersed bubbly is predicted based on the evolved bubble size. The model prediction gives a good match with the experimental data and existing theory. A shift in the transition boundary is noted due to the variation in inlet bubble size and the dimension of the annulus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 31, Issue 1, February 2010, Pages 101–114
نویسندگان
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