Abonnement à la biblothèque: Guest
Portail numérique Bibliothèque numérique eBooks Revues Références et comptes rendus Collections
Atomization and Sprays
Facteur d'impact: 1.262 Facteur d'impact sur 5 ans: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

Volumes:
Volume 29, 2019 Volume 28, 2018 Volume 27, 2017 Volume 26, 2016 Volume 25, 2015 Volume 24, 2014 Volume 23, 2013 Volume 22, 2012 Volume 21, 2011 Volume 20, 2010 Volume 19, 2009 Volume 18, 2008 Volume 17, 2007 Volume 16, 2006 Volume 15, 2005 Volume 14, 2004 Volume 13, 2003 Volume 12, 2002 Volume 11, 2001 Volume 10, 2000 Volume 9, 1999 Volume 8, 1998 Volume 7, 1997 Volume 6, 1996 Volume 5, 1995 Volume 4, 1994 Volume 3, 1993 Volume 2, 1992 Volume 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2017020148
pages 807-819

EXPERIMENTAL AND NUMERICAL STUDY OF BUBBLE GROWTH PROCESS WITHIN A SUPERHEATED WATER DROPLET

Lu Liu
School of Power, Energy and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Wenjing Ma
School of Power, Energy and Mechanical Engineering, North China Electric Power University, Baoding 071003, China
Luxiang Zong
School of Power, Energy and Mechanical Engineering, North China Electric Power University, Baoding 071003, China

RÉSUMÉ

This paper reports an experimental and numerical study of bubble growth process within a water droplet due to depressurization. During the experiment, a distilled water droplet was suspended on a thermocouple, which was also used to measure the droplet temperature. A high-speed camera was applied to record the bubble expansion. A mathematical model was developed based on the momentum equation of bubble growth coupling with the energy conservation equation. The heat transfer due to flash evaporation was considered at the droplet surface. The mechanical nonequilibrium on the formation of bubble nucleus was also introduced. Especially, this model considered the influence of thermocouple on bubble growth. The model predictions agree well with the experimental data, demonstrating the soundness of the present model. Through the numerical calculations, the main factors affecting the bubble growth were analyzed. The results show that the main influences on bubble growth include pressure difference, surface tension, and friction resistance between the droplet and the thermocouple. The existence of thermocouple slows down the bubble growth, and its effect is controlled by the competition between the increase of liquid velocity and the reduction of contact area.


Articles with similar content:

A STUDY OF THE MECHANISM OF SOLID-PARTICLE ENHANCED NUCLEATE BOILING HEAT TRANSFER AT A FLAT HEATING SURFACE
International Heat Transfer Conference 11, Vol.13, 1998, issue
M. H. Shi, Zhongliang Liu, Guosheng Dai
DEVELOPMENT AND VALIDATION OF A FLASH BOILING MODEL FOR SINGLE-COMPONENT FUEL DROPLETS
Atomization and Sprays, Vol.27, 2017, issue 11
Shiyou Yang
INVESTIGATION OF VAPOUR BUBBLES EFFECT ON TEMPERATURE OF HEAT TRANSFERING SURFACE AT NUCLEATE BOILING
International Heat Transfer Conference 5, Vol.6, 1974, issue
V. I. Subbotin, D. N. Sorokin, A.A. Gribov , A.A. Tzyganok
TRANSIENT HEAT TRANSFER IN A TRANSLATING DROPLET AFTER FORMATION AND RELEASE
International Heat Transfer Conference 7, Vol.12, 1982, issue
E. Marschall, W. Sander-Beuermann
THE EFFECTS OF UNIFORM ELECTROSTATIC FIELDS ON BUBBLE BEHAVIOR AND BOILING HEAT TRANSFER IN "FREON-113"
International Heat Transfer Conference 4, Vol.29, 1970, issue
Victor Asch, Alan S. Foust