کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6591309 456871 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Friction factor of microbubbles in capillary tubes at low Reynolds numbers
ترجمه فارسی عنوان
ضریب اصطکاک میکرو حباب ها در لوله های مویرگی در اعداد رینولدز کم
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
The small size of microbubbles, along with their stability, has made them popular in many applications. Most of the applications involve the flow of microbubbles through capillary environments. In this study, the rheological behavior of microbubbles has been examined using their flow index in capillary tubes, in Re<50. The flow indexes of microbubbles have been calculated from the experimental pressure drop measured along the capillary tube. Microbubbles presented pseudoplastic behavior. Flow index was only influenced by bubble void fraction and did not show any dependency on the geometrical conditions of the tube. From the measured pressure drops along the capillary tubes, the Fanning friction factor has been calculated. It has been found that, in low Re numbers, Poiseuille׳s equation underestimates friction factor. In this work, for the first time,the non-Newtonian Re was employed to calculate the Fanning friction factor for microbubbles suspensions in capillary tube. A very good agreement between experimental data and the linear equation of friction factor with non-Newtonian Re has been observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 112, 14 June 2014, Pages 72-78
نویسندگان
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