Abstract
This chapter provides information about the diffusion phenomenon (heat and mass transfer) in porous materials such as definition, classification, modeling and experiments, with particular reference to capillary-porous body with arbitrary shape. A transient three-dimensional mathematical formulation written in boundary-fitted coordinates and all numerical formalism to discretize the diffusion equation by using the finite-volume method, including grid generation and numerical analysis of the computational solution are presented. Applications to food and ceramic industries have been done with success. An optimization technique has been presented to estimation of transport properties by comparison between numerical and experimental data.
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Acknowledgments
The authors would like to express their thanks to Brazilian agencies CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) and CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) for supporting this work, and are also grateful to the authors of the references in this chapter that helped in the improvement of quality. Sincere thanks to Editor Prof. João M.P.Q. Delgado by the opportunity given to present our research in this book.
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Farias, V.S.O., Silva, W.P., Silva, C.M.D.P.S., Delgado, J.M.P.Q., Farias Neto, S.R., Barbosa de Lima, A.G. (2012). Transient Diffusion in Arbitrary Shape Porous Bodies: Numerical Analysis Using Boundary-Fitted Coordinates. In: Delgado, J., de Lima, A., da Silva, M. (eds) Numerical Analysis of Heat and Mass Transfer in Porous Media. Advanced Structured Materials, vol 27. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30532-0_4
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