کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
659958 | 1458106 | 2011 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of bubble departure and lift-off diameter models in low heat flux and low flow velocity conditions
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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: Development of bubble departure and lift-off diameter models in low heat flux and low flow velocity conditions Development of bubble departure and lift-off diameter models in low heat flux and low flow velocity conditions](/preview/png/659958.png)
چکیده انگلیسی
The forces acting on a bubble were analyzed to determine the criteria for bubble departure and lift-off from a heated wall. Mechanistic models for the bubble departure and lift-off diameters were developed from the analysis results to predict the evaporation heat flux under low heat flux and low flow velocity conditions. The developed model for the departure diameter depends strongly on the contact angle, but the model for the lift-off diameter was found to be a function of the lift-off number, which indicates the ratio between the shear lift force and the growth force. Wall boiling experiments were performed to measure bubble departure and lift-off diameters using digital image processing. From the experimental data, the developed models were validated, and the results showed good agreement between the experimental data and the predicted diameters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 54, Issues 15â16, July 2011, Pages 3234-3244
Journal: International Journal of Heat and Mass Transfer - Volume 54, Issues 15â16, July 2011, Pages 3234-3244
نویسندگان
Yun-Je Cho, Soo-Been Yum, Jeong-Hun Lee, Goon-Cherl Park,