Enhancing the onset of pool boiling by wettability modification on nanometrically smooth surfaces

被引：122

作者：

Bourdon, B. ^{[1
]}

Di Marco, P. ^{[2
]}

Rioboo, R. ^{[1
]}

Marengo, M. ^{[3
]}

De Coninck, J. ^{[1
]}

机构：

[1] Univ Mons, Lab Phys Surfaces & Interfaces, B-7000 Mons, Belgium

[2] Univ Pisa, DESTEC, I-56122 Pisa, Italy

[3] Univ Bergamo, Dept Engn, I-24044 Dalmine, Italy

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2013年 / 45卷

关键词：

Wettability; Heat transfer; Smooth surface; Incipient boiling; Hydrophobicity; Phase change; HEAT-TRANSFER; MICROBOILING BEHAVIOR; ARTIFICIAL CAVITIES; NUCLEATION; SILICON; MICROSTRUCTURES; MONOLAYERS; FC-72;

D O I：

10.1016/j.icheatmasstransfer.2013.04.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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 degrees C superheat on the hydrophobic case and the heat transfer coefficient (HTC) changed suddenly from the one of a convection regime (1.5 kW/m(2) K) to the one of a nucleate boiling regime (4 kW/m(2) K). On the contrary for the hydrophilic case, despite superheat above 37 degrees C and presence of boiling, the HTC was kept as the one of the convection regime. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：11 / 15

页数：5

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