کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6590065 456853 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experiments and modeling on bubble uniformity of Taylor flow in T-junction microchannel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Experiments and modeling on bubble uniformity of Taylor flow in T-junction microchannel
چکیده انگلیسی
Bubble uniformity of Taylor flow in a T-junction microchannel characterized by the bubble length variation coefficient (CVb) was studied via both experiments and theoretical derivations. On the one hand, the correlation between bubble uniformity and the Capillary number (Ca) ranging from 0.00027 to 0.0071 was established at operating conditions with different flow rates of gas and liquid and various liquid phases. A sudden increase of CVb was observed when the value of Ca was below a certain threshold indicating compromised bubble uniformity. Pressure sensors and a high-speed camera were used to analyze the causes of such a phenomenon by monitoring the bubble breakup process at outlet. As Ca was smaller than 0.0008, bubble breakup generated a large pressure variation which seriously affected the gas flow rate and bubble uniformity. On the other hand, a pressure model was derived to quantize pressure variations and to estimate CVb, which were validated by experimental data and showed promising performances. Moreover, the model for calculating CVb can also be used to optimize operating condition and ensure the bubbles uniformity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 128, 25 May 2015, Pages 11-20
نویسندگان
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