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On the Characteristic Drying Rate Approach to Correlating Experimental Results of the Drying of Moist Porous Materials
Author(s) -
Chen Xiao Dong
Publication year - 2002
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450800523
Subject(s) - mass transfer , materials science , porous medium , porosity , constant (computer programming) , boundary layer , mechanics , thermodynamics , composite material , computer science , physics , programming language
Schlunder's model of a surface, is the only fundamental attempt to explain the constant drying rate phenomena, for materials with pore sizes of a few microns. Here, a direct comparison between this approach and the conventional mass transfer (CMT) theory has been made, by extending the approach to incorporate cell sizes of food, plant materials and to low water contents. Contrast to CMT, the extended Schlunder's model analysis suggests that the boundary layer thickness have an effect on the relative drying rate. Some new experimental results are also presented to support one viewpoint regarding the characteristic drying rate method.