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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2015010730
pages 141-155

NUMERICAL SIMULATION OF LAMINAR FILM CONDENSATION OF VAPOR IN A HORIZONTAL MINICHANNEL WITH AND WITHOUT A NONCONDENSABLE GAS

Zhan Yin
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China
Jianjun Wen
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China
Min Zeng
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
Qiu-Wang Wang
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P.R. China

Краткое описание

A steady two-dimensional volume of fluid (VOF) simulation of laminar film condensation of vapor with and without a noncondensable gas inside a 1-mm horizontal minichannel is presented. The uniform interface temperature and wall temperature are fixed as boundary conditions, and the flow pattern is expected to be annular. The numerical simulation results display the evolution of the liquid−gas interface, Nu, and heat flux. It is found that the global effect of gravity is negligible. Moving downstream the minichannel, the liquid film grows rapidly near the entrance and then remains unchanged in the rest of the minichannel till the end. Higher inlet velocity and wall temperature of the minichannel lead to the augmentation of the average Nu value of condensation. The existence of a noncondensable gas makes the heat flux to decrease sharply compared to that vapor condensation, while a higher inlet velocity will aggravate this effect. Meanwhile, the noncondensable gas with smaller thermal conductivity would give rise to greater reduction of heat flux as a result of the higher thermal resistance in the noncondensable gas layer.


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