Single bubble dynamics on a superhydrophilic surface with artificial nucleation sites

被引：121

作者：

Nam, Youngsuk ^{[1
]}

Aktinol, Eduardo ^{[1
]}

Dhir, Vijay K. ^{[1
]}

Ju, Sungtaek ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Aerosp Engn & Mech, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Calif NanoSyst Inst CNSI, Los Angeles, CA 90024 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2011年 / 54卷 / 7-8期

关键词：

Single bubble; Superhydrophilic; Cupric oxide; Bubble departure diameter; CRITICAL HEAT-FLUX; WETTABILITY; WATER;

D O I：

10.1016/j.ijheatmasstransfer.2010.11.031

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The dynamics of single bubbles on a superhydrophilic surface with well-defined nucleation sites are studied. The superhydrophilic surfaces are prepared by forming CuO nanostructures on a silicon substrate with an isolated microcavity. The bubble departure diameter in water is observed to be 2.5 times smaller and the growth period 4 times shorter on the superhydrophilic surface than on a silicon substrate. A model balancing the buoyancy with the surface tension force captures the departure diameter well, confirming the importance of wettability on bubble dynamics. The present work helps develop new surfaces for controlled phase change heat transfer and bubble-based micro-devices. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1572 / 1577

页数：6

共 29 条

[1]

ABARAJITH HS, 2002, P IMECE 2002 NEW ORL

[2]

AKTINOL E, 2010, ITT WORKSH 2 PHAS SY

[3]

CAREY VP, 2008, LIQUID VAPOR PHASE C, P210

[4] Wettability of porous surfaces. [J].

Cassie, ABD ;

Baxter, S .

TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 :0546-0550

[5]

Chi-Yeh H., 1965, Int. J. Heat Mass Transf., V8, DOI [10.1016/0017-9310(65)90073-6, DOI 10.1016/0017-9310(65)90073-6]

[6]

Cole R., 1968, Chemical Engineering Progress Symposium Series, V65, P211, DOI DOI 10.1016/J.IJHEATMASSTRANSFER.2011.04.007

[7] Mechanistic prediction of nucleate boiling heat transfer - Achievable or a hopeless task? [J].

Dhir, VK .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2006, 128 (01) :1-12

[8]

Dhir VK, 2005, NATO SCI SER II MATH, V193, P197

[9]

Fritz W, 1935, PHYS Z, V36, P379

[10]

Gorenflo D., 1986, P 8 INT HEAT TRANSFE, V4, P1995, DOI 10.1615/ihtc8.3920

← 1 2 3 →