Direct observation of a liquid film under a vapor environment in a pool boiling using a nanofluid

被引:15
作者
Bang, IC
Chang, SH
Baek, WP
机构
[1] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea
[2] Korea Atom Energy Res Inst, Taejon 305353, South Korea
关键词
D O I
10.1063/1.1873053
中图分类号
O59 [应用物理学];
学科分类号
摘要
The existence of a liquid film separating a vapor bubble from a heated solid surface is confirmed using a nanofluid. The existence of such a liquid film had been a theoretical premise of the critical heat flux mechanism, significantly difficult to verify through experimental observations. Here, we show that a liquid film under a massive vapor bubble adheres to a heated solid surface. The liquid film comes into being trapped in a dynamic coalescence environment of nucleate bubbles, which grow and depart continuously from the heated surface. In its dryout process, the liquid film displays vapor "holes" originating from the rupture of discrete nucleating bubbles. The dryout process of the liquid film can be understood from the vaporization of rims of the holes and of smooth film region. (C) 2005 American Institute of Physics.
引用
收藏
页码:1 / 3
页数:3
相关论文
共 10 条
[1]  
[Anonymous], POOL EXT FLOW BOIL A
[2]   Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles [J].
Eastman, JA ;
Choi, SUS ;
Li, S ;
Yu, W ;
Thompson, LJ .
APPLIED PHYSICS LETTERS, 2001, 78 (06) :718-720
[3]  
GAERTNER RF, 1965, CHEM ENG PROG S SER, V56, P39
[4]  
Hsu Y.Y., 1986, Transport Processes in Boiling and Two-Phase Systems
[5]   PRINCIPAL MECHANISM OF BOILING CRISIS IN POOL BOILING [J].
KATTO, Y ;
YOKOYA, S .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1968, 11 (06) :993-&
[6]  
Kirby D.B., 1965, CHEM ENG PROG S SER, V61, P238
[7]   Alternative dewetting pathways of thin liquid films [J].
Yerushalmi-Rozen, R ;
Kerle, T ;
Klein, J .
SCIENCE, 1999, 285 (5431) :1254-1256
[8]   Effect of nanoparticles on critical heat flux of water in pool boiling heat transfer [J].
You, SM ;
Kim, JH ;
Kim, KH .
APPLIED PHYSICS LETTERS, 2003, 83 (16) :3374-3376
[9]  
YU CL, 1977, INT J HEAT MASS TRAN, V20, P827
[10]   Pressure and power generation during explosive vaporization on a thin-film microheater [J].
Zhao, Z ;
Glod, S ;
Poulikakos, D .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2000, 43 (02) :281-296