کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
662150 1458180 2005 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Boiling heat transfer in rectangular microchannels with reentrant cavities
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Boiling heat transfer in rectangular microchannels with reentrant cavities
چکیده انگلیسی
This paper investigates flow boiling of water in microchannels with a hydraulic diameter of 227 μm possessing 7.5 μm wide reentrant cavities on the sidewalls. Average two-phase heat transfer coefficients and CHF conditions have been obtained over a range of effective heat fluxes (28-445 W/cm2) and mass velocities (41-302 kg/m2 s). High Boiling number and Reynolds number have been found to promote convective boiling, while Nucleate Boiling dominated at low Reynolds number and Boiling number. A criterion for the transition between nucleate and convective boiling has been provided. Existing correlations did not provide satisfactory agreement with the heat transfer coefficient but did predict CHF conditions well.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 48, Issues 23–24, November 2005, Pages 4867-4886
نویسندگان
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