کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7060415 1458512 2014 48 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An experimental characterization of liquid films in downwards co-current gas-liquid annular flow by particle image and tracking velocimetry
ترجمه فارسی عنوان
یک ویژگی تجربی از فیلم های مایع در جریان حلقوی جریان گاز جاری با استفاده از تصاویر ذرات و سرعت سنجی ردیابی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
The hydrodynamics of downwards gas-liquid annular flows and falling films in a pipe were studied experimentally using simultaneous planar laser-induced fluorescence and a combination of particle image and particle tracking velocimetry techniques. The investigated conditions covered the range of liquid and gas Reynolds numbers: ReL=306-1532 and ReG=0-84600. The results presented in this paper concern: (i) information on the local and instantaneous velocity fields underneath the interfacial waves and the appearance of recirculation zones within the liquid films under certain conditions, and (ii) mean velocity, velocity fluctuation rms and kinetic energy profiles within the liquid films. The results indicate that large waves contain multiple recirculation zones, which may play an important role in the gas and liquid phase entrainment mechanisms as well as in the mass and momentum transfer from the near-wall region towards the gas-liquid interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Multiphase Flow - Volume 67, Supplement, December 2014, Pages 42-53
نویسندگان
, ,