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Mixed convection heat and Mass transfer in a vertical channel with film evaporation

 

作者: Wei‐Mon Yan,  

 

期刊: The Canadian Journal of Chemical Engineering  (WILEY Available online 1993)
卷期: Volume 71, issue 1  

页码: 54-62

 

ISSN:0008-4034

 

年代: 1993

 

DOI:10.1002/cjce.5450710108

 

出版商: Wiley Subscription Services, Inc., A Wiley Company

 

关键词: heat and mass transfer;mixed convection;film vaporization

 

数据来源: WILEY

 

摘要:

AbstractNumerical results are presented for effects of latent heat transport associated with film vaporization on laminar mixed convection heat and mass transfer in a vertical channel with a half channel widthb= 0.01 m. The influences of the inlet liquid mass flowrate and wall temperature on the film vaporization and the associated heat and mass transfer characteristics are examined for air‐water and air‐ethanol systems with gas Reynolds numberReg= 2000. Predicted results obtained by including transport in the liquid film are contrasted with those where liquid film transport is neglected, showing that the assumption of an extremely thin film made in Lin et al. (1988) and Yan and Lin (1989) is only valid for systems having small liquid mass flow rates. Additionally, it is found that the interfacial heat flux is predominantly determined by latent heat transfer connected with film evaporat

 

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