Transient characteristics of initial droplet size distribution and effect of pressure on evolution of transient condensation on low thermal conductivity surface

被引：27

作者：

Ma, Xue-Hu ^{[1
]}

Song, Tian-Yi ^{[1
]}

Lan, Zhong ^{[1
]}

Bai, Tao ^{[1
]}

机构：

[1] Dalian Univ Technol, Inst Chem Engn, Dalian 116012, Peoples R China

来源：

INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2010年 / 49卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Initial dropwise condensation; Transient droplet size distribution; Low thermal conductivity surface; DROPWISE CONDENSATION; HEAT-TRANSFER; NUMERICAL-SIMULATION; GROWTH; STEAM; GAS;

D O I：

10.1016/j.ijthermalsci.2010.05.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The droplet size distribution evolution in the initial dropwise condensation process from formation of primary droplets to fully developed stage has been investigated by utilizing high speed camera and microscope. Focus was put on the transient characteristics of droplet size distribution in this duration, it has been revealed that the primary droplets just formed on the condensing surface satisfied Lognormal distribution, with coalescing among them (without departing from condensing surface), bimodal size distribution formed, finally the classical exponential size distribution showed on the condensing surface when the condensation became steady state. At the same time, the effect of steam pressure on the evolution of transient dropwise condensation on low thermal conductivity surface has been analyzed. All the investigations included in the present paper are for the first droplets cycle of dropwise condensation. (C) 2010 Elsevier Masson SAS. All rights reserved.

引用

页码：1517 / 1526

页数：10

共 23 条

[1] Modeling of heat transfer in dropwise condensation [J].

AbuOrabi, M .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1998, 41 (01) :81-87

[2] Digital computer simulation of dropwise condensation from equilibrium droplet to detectable size [J].

Burnside, BM ;

Hadi, HA .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1999, 42 (16) :3137-3146

[3]

*CHEMICALOGIC STEA, THERM TRANSP PROP WA

[4] EXPERIMENTS AND SIMULATION OF THE GROWTH OF DROPLETS ON A SURFACE (BREATH FIGURES) [J].

FRITTER, D ;

KNOBLER, CM ;

BEYSENS, DA .

PHYSICAL REVIEW A, 1991, 43 (06) :2858-2869

[5] NUMERICAL SIMULATION OF DROPWISE CONDENSATION [J].

GLICKSMAN, LR ;

HUNT, AW .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1972, 15 (11) :2251-+

[6] MODEL FOR DROPWISE CONDENSATION ON RANDOMLY DISTRIBUTED SITES [J].

GOSE, EE ;

MUCCIARDI, AN ;

BAER, E .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1967, 10 (01) :15-+

[7] DROP SIZE DISTRIBUTIONS AND HEAT-TRANSFER IN DROPWISE CONDENSATION [J].

GRAHAM, C ;

GRIFFITH, P .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1973, 16 (02) :337-346

[8] DROPWISE CONDENSATION OF STEAM AT LOW-PRESSURES [J].

HATAMIYA, S ;

TANAKA, H .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1987, 30 (03) :497-507

[9] Theoretical Study of Dropwise Condensation Heat Transfer: Effect of the Liquid-Solid Surface Free Energy Difference [J].

Lan, Zhong ;

Ma, Xuehu ;

Zhou, Xingdong ;

Wang, Mingzhe .

JOURNAL OF ENHANCED HEAT TRANSFER, 2009, 16 (01) :61-71

[10] Dropwise condensation: Experiments and simulations of nucleation and growth of water drops in a cooling system [J].

Leach, R. N. ;

Stevens, F. ;

Langford, S. C. ;

Dickinson, J. T. .

LANGMUIR, 2006, 22 (21) :8864-8872

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