کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10262699 | 457061 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A method for time and spatially resolved measurement of convective heat transfer coefficient (h) in complex flows
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A method for time and spatially resolved measurement of convective heat transfer coefficient (h) in complex flows A method for time and spatially resolved measurement of convective heat transfer coefficient (h) in complex flows](/preview/png/10262699.png)
چکیده انگلیسی
A miniaturized plane probe (5Ã5Ã1.1mm3) was developed to measure on-line local and unsteady convective heat transfer coefficients (h) in complex flows. The proposed method is in particular dedicated to assess h at the surface of porous media subjected to mass transport that interacts with the surrounding flow such as those that occur between a partially saturated porous medium and hot fluid phase (superheated steam, oil, etc.). The active h-probe consisted of a combination of a film heater sandwiched between two heat flux sensors, and h was obtained on each side from temperature and flux outputs of flux sensors in response to a periodic input of heating (maximum increase in probe surface temperature <2.5âC). In controlled hydrodynamic conditions, it was found that 3 cycles of 1Â Hz measurements ensured h relative errors ranged between â3% and â0.5% with 98% confidence for h values ranged between 200 and 500Wm-2K-1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 60, Issue 5, March 2005, Pages 1219-1236
Journal: Chemical Engineering Science - Volume 60, Issue 5, March 2005, Pages 1219-1236
نویسندگان
Olivier Vitrac, Gilles Trystram,