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DIRECT CONTACT DRYING OF A MOVING POROUS STRIP

 

作者: A. G. Fedorov,   R. Viskanta,  

 

期刊: Drying Technology  (Taylor Available online 1997)
卷期: Volume 15, issue 5  

页码: 1327-1351

 

ISSN:0737-3937

 

年代: 1997

 

DOI:10.1080/07373939708917297

 

出版商: Taylor & Francis Group

 

关键词: conjugate heat transfer;evaporation dynamics;enhancement;material processing

 

数据来源: Taylor

 

摘要:

Combined heat transfer and evaporation dynamics are analyzed during drying of a continuously moving, porous strip which is in direct contact with a heated plate. A transient, quasi-two-dimensional model of conjugate heat transfer between a hot massive externally /internally heated plate and wet porous strip moving along the plate is developed by accounting for evaporation dynamics. The model consists of four conjugate energy conservation equations with proper boundary/interface conditions which describe the heat transfer in four distinct zones (1-electrically or indirectly heated massive metal plate, 2-thin superheated vapor film resulting from vaporization of water in the porous strip that separates hot plate and porous strip, 3-dry region of the porous strip, and 4-wet region of the porous strip). The relevant dimensiouless parameters governing the problem are identified, and results of parametric calculations are reported to gain fundamental understanding of the process.

 

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