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Información tecnológica

versión On-line ISSN 0718-0764

Resumen

NASCIMENTO, José J. S; DE LIMA, Antonio G. B; TERUEL, Barbara J  y  BELO, Francisco A. Heat and Mass Transfer with Shrinkage During the Drying of Ceramic Bricks. Inf. tecnol. [online]. 2006, vol.17, n.6, pp.125-132. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642006000600019.

A three-dimensional, transitional mathematical model is presented, as applied to the phenomenon of diffusion of heat and material which results in the reduction of volume in the interiors of parallelepiped solids. The model has been applied to the drying process of ceramic bricks. The method of finite volumes was employed, considering constant thermal and mechanical properties and surrounding convective conditions over the surface of the material. The model was used to study the process of drying of a ceramic brick at temperatures of 60° and 80°C with relative humidities of surrounding air of 10.07 and 4.66% . The numerical results of moisture content, temperature, and reduction in volume were compared with experimental data to determine the transport coefficients. It can be concluded that the phenomenon of reduction in volume occurs over two periods and considerably affects the drying of the solid, as well as the distribution of the moisture content within the interior of the solid.

Palabras clave : drying; ceramic bricks; finite volume; simulation; parallelepiped.

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