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TRANSIENT NATURAL DRYING-INDUCED BOUNDARY LAYERS

 

作者: WANYRROMERO FERREIRA,   MAURI FORTES,  

 

期刊: Drying Technology  (Taylor Available online 2000)
卷期: Volume 18, issue 1-2  

页码: 49-65

 

ISSN:0737-3937

 

年代: 2000

 

DOI:10.1080/07373930008917692

 

出版商: Taylor & Francis Group

 

关键词: Natural convection;numerical simulation;heat and mass transfer coefficients

 

数据来源: Taylor

 

摘要:

This work presents a methodology far obtaining heat and mass transfer coefficients for problems involving natural convection along a flat plate. In order to simulate drying conditions, a set of data has been obtained for the temperature range between 20 and 98° C and for various absolute humidities, both of the wall and ambient. It is shown that for drying at temperatures above 80° C, Nusselt and Sherwood numbers change very appreciably with respect to values obtained at smaller temperatures. The simulated results show that even for very low temperature differences, the transient period in natural convection along a flal vertical plate is smaller than 3s.

 

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