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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