Numerical Simulation of Laminar Film Condensation in a Horizontal Minitube with and Without Non-Condensable Gas by the VOF Method
(2015) In Numerical Heat Transfer Part A: Applications 68(9). p.958-977- Abstract
- Based on the volume of fluid (VOF) method, a steady three-dimensional numerical simulation of laminar film condensation of water vapor in a horizontal minitube, with and without non-condensable gas, has been conducted. A user-defined function defining the phase change is interpreted and the interface temperature is correspondingly assumed to be the saturation temperature. An annular flow pattern is to be expected according to a generally accepted flow regime map. The heat-transfer coefficient increases with higher saturation temperature and a smaller temperature difference between the saturation and wall temperatures, but varies little with different mass flux and degree of superheat. The existence of a non-condensable gas will lead to the... (More)
- Based on the volume of fluid (VOF) method, a steady three-dimensional numerical simulation of laminar film condensation of water vapor in a horizontal minitube, with and without non-condensable gas, has been conducted. A user-defined function defining the phase change is interpreted and the interface temperature is correspondingly assumed to be the saturation temperature. An annular flow pattern is to be expected according to a generally accepted flow regime map. The heat-transfer coefficient increases with higher saturation temperature and a smaller temperature difference between the saturation and wall temperatures, but varies little with different mass flux and degree of superheat. The existence of a non-condensable gas will lead to the generation of a gas layer between vapor and liquid, resulting in a lower mass-transfer rate near the interface and higher vapor quality at the outlet. In consequence, the heat-transfer coefficient of condensation with a non-condensable gas drops sharply compared with that of pure vapor condensation. Meanwhile, the non-condensable gas with a smaller thermal conductivity would cause a stronger negative effect on heat flux as a result of a higher thermal resistance of heat conduction in the non-condensable gas layer. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7584778
- author
- Yin, Zhan ; Guo, Yanling ; Sundén, Bengt LU ; Wang, Qiuwang and Zeng, Min
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Numerical Heat Transfer Part A: Applications
- volume
- 68
- issue
- 9
- pages
- 958 - 977
- publisher
- Taylor & Francis
- external identifiers
-
- wos:000356700600002
- scopus:84932634596
- ISSN
- 1040-7782
- DOI
- 10.1080/10407782.2015.1023143
- language
- English
- LU publication?
- yes
- id
- b26973c2-7532-4e95-9c0b-2c66cd59b20e (old id 7584778)
- date added to LUP
- 2016-04-01 13:13:32
- date last changed
- 2022-04-06 03:18:16
@article{b26973c2-7532-4e95-9c0b-2c66cd59b20e,
abstract = {{Based on the volume of fluid (VOF) method, a steady three-dimensional numerical simulation of laminar film condensation of water vapor in a horizontal minitube, with and without non-condensable gas, has been conducted. A user-defined function defining the phase change is interpreted and the interface temperature is correspondingly assumed to be the saturation temperature. An annular flow pattern is to be expected according to a generally accepted flow regime map. The heat-transfer coefficient increases with higher saturation temperature and a smaller temperature difference between the saturation and wall temperatures, but varies little with different mass flux and degree of superheat. The existence of a non-condensable gas will lead to the generation of a gas layer between vapor and liquid, resulting in a lower mass-transfer rate near the interface and higher vapor quality at the outlet. In consequence, the heat-transfer coefficient of condensation with a non-condensable gas drops sharply compared with that of pure vapor condensation. Meanwhile, the non-condensable gas with a smaller thermal conductivity would cause a stronger negative effect on heat flux as a result of a higher thermal resistance of heat conduction in the non-condensable gas layer.}},
author = {{Yin, Zhan and Guo, Yanling and Sundén, Bengt and Wang, Qiuwang and Zeng, Min}},
issn = {{1040-7782}},
language = {{eng}},
number = {{9}},
pages = {{958--977}},
publisher = {{Taylor & Francis}},
series = {{Numerical Heat Transfer Part A: Applications}},
title = {{Numerical Simulation of Laminar Film Condensation in a Horizontal Minitube with and Without Non-Condensable Gas by the VOF Method}},
url = {{http://dx.doi.org/10.1080/10407782.2015.1023143}},
doi = {{10.1080/10407782.2015.1023143}},
volume = {{68}},
year = {{2015}},
}