کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
662144 | 1458180 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Boiling nucleation and two-phase flow patterns in forced liquid flow in microchannels
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Boiling nucleation and two-phase flow patterns in forced liquid flow in microchannels Boiling nucleation and two-phase flow patterns in forced liquid flow in microchannels](/preview/png/662144.png)
چکیده انگلیسی
Using microfabrication techniques, a microscale platinum heater was fabricated on a Pyrex glass wafer and located in a shallow, but nearly trapezoidal microchannel with a hydraulic diameter of Dh = 56 microns fabricated on another glass wafer. Using a high-speed digital CCD video camera and microscope, the boiling nucleation temperature and two-phase flow patterns were observed and examined at different mass flow rates. The nucleation temperature was found to be reasonably close to the theoretical values as predicted by a 3D numerical heat transfer simulation with the measured bulk temperature of the microheater. The stability of the developed flow indicated three clearly distinguishable two-phase flow regimes: bubbly, wavy and annular. To avoid problems observed in the past, care was taken to ensure that the results were not influenced by the entrance and/or exit regions of the test section. The observed variations in the two-phase flow patterns were compared with the results of a model developed using a stability analysis of the liquid film.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 48, Issues 23â24, November 2005, Pages 4797-4810
Journal: International Journal of Heat and Mass Transfer - Volume 48, Issues 23â24, November 2005, Pages 4797-4810
نویسندگان
J. Li, G.P. Peterson,