Cross-effect of heat and mass transfer of Luikov equation: Measurement andanalysis

Citation
St. Hu et al., Cross-effect of heat and mass transfer of Luikov equation: Measurement andanalysis, DRY TECHNOL, 17(9), 1999, pp. 1859-1877
Citations number
3
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
DRYING TECHNOLOGY
ISSN journal
0737-3937 → ACNP
Volume
17
Issue
9
Year of publication
1999
Pages
1859 - 1877
Database
ISI
SICI code
0737-3937(1999)17:9<1859:COHAMT>2.0.ZU;2-L
Abstract
This paper mainly focuses on cross-effect of heat and mass transfer of capi llary porous media which A.B.Luikov set up on irreversible thermodynamics p rinciple. On the basis of perfecting the equations of heat and mass transfe r, the heat and mass transfer parameters are determined curing drying proce sses, and thermal gradient coefficient delta and moisture gradient coeffici ent xi are obtained which show the cross-effect of heat and mass transfer. Thus the fundamentals are provided for quantitative analysis of cross-effec t of heat and mass transfer. The convective drying mathematical model under the first unsteady boundary condition is therefore proposed. By the applic ation of Henry transform, the theoretical solution of unsteady drying proce ss is given and its validity is verified through experiments. Finally, by u se of the mathematical model the influence of all factors on temperature an d moisture distribution and the cross-effect of heat and mass transfer duri ng drying processes are quantitatively analyzed. The influences of cross-ef fect on heat and mass transfer are provided respectively. Mutual effect con dition is also provided.