کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
653418 1457509 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancing the onset of pool boiling by wettability modification on nanometrically smooth surfaces
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Enhancing the onset of pool boiling by wettability modification on nanometrically smooth surfaces
چکیده انگلیسی
Pool boiling experiments are performed with degassed water on highly smooth surfaces of two different wettabilities: hydrophilic and hydrophobic cases. Boiling curves and visual observations on the boiling have been performed. The onset of nucleate boiling (ONB) has been measured and the influence of the wettability has been quantified. As the inherent mean roughness of the glass substrates was lower than one nanometer it was possible to show the sole effect of the wettability. No hysteresis in the boiling curve was observed for both cases. The ONB was observed after 3.5 °C superheat on the hydrophobic case and the heat transfer coefficient (HTC) changed suddenly from the one of a convection regime (1.5 kW/m2 K) to the one of a nucleate boiling regime (4 kW/m2 K). On the contrary for the hydrophilic case, despite superheat above 37 °C and presence of boiling, the HTC was kept as the one of the convection regime.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 45, July 2013, Pages 11-15
نویسندگان
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