Drying of clay slabs: Experimental determination and prediction by two-dimensional diffusion models

Experiments on convective drying of clay slabs with an initial moisture content of 0.11 (dry basis, db) were performed at 50 and 90°C. A two-dimensional numerical solution of the diffusion equation with a boundary condition of the third kind was proposed to describe the process using a constant (mod...

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Published inCeramics international Vol. 39; no. 7; pp. 7911 - 7919
Main Authors da Silva, Wilton Pereira, da Silva e Silva, Cleide Maria Diniz Pereira, da Silva, Laerson Duarte, Farias, Vera Solange de Oliveira
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2013
Subjects
Clay (material)
Diffusion
Drying
Effective mass diffusivity
Mathematical analysis
Mathematical models
Moisture content
Numerical simulation
Optimization
Slabs
Two dimensional
Two-dimensional domain
Two-dimensional domain
Numerical simulation
Optimization
Effective mass diffusivity
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Summary:Experiments on convective drying of clay slabs with an initial moisture content of 0.11 (dry basis, db) were performed at 50 and 90°C. A two-dimensional numerical solution of the diffusion equation with a boundary condition of the third kind was proposed to describe the process using a constant (model 1) and variable (model 2) effective mass diffusivity value. The solution was coupled with an optimizer to determine the process parameters at each temperature using experimental datasets. The analyses of the results indicated good agreement for model 2 between each experimental dataset and the corresponding simulation.
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ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2013.03.053