Transferência de calor e massa em sólidos porosos com geometria complexa via análise concentrada: modelagem e simulação.

Abstract

The drying process consists of the removal of moisture from a material through heating, involving simultaneous heat and mass transfer between the material and the drying air, being an important step in the formation of a clay and ceramic material. In this sense, this work aims at simulating the drying of cast and cast solids. To describe the drying process of porous materials, the global capacitance method was used. The application has been made for the drying of ceramic materials in order to obtain kinetic results of loss of mass and heat of the same. Different cases were simulated by varying the shape of the body, from which the kinetics of drying (loss of moisture) and heating of the solid (temperature increase) were obtained. It was observed that the process of moisture loss occurs at a slower rate than the heating of the ceramic material, because its thermal diffusivity is much higher than mass diffusivity, and that the shape of the solid, particularly its area / volume ratio strongly affects The phenomena of heat and mass transport.