Artículo
Abstract:
The thin-layer drying of corn was analyzed in terms of Fick's second law for diffusion. For spherical kernels (sphericity 0.98) Fick's law for diffusion out of a sphere was found appropriate model experimental drying curves. The diffusion coefficients deter mined by means of this equation and corrected by the square of the sphericity were taken as the intrinsic diffusivities of corn grain. Dent kernels were modeled by means of Fick's law assuming three different geometries: sphere, ellipsoid and parallelopiped. It was found that although the “Fickian” model describes reasonably well the. experimental drying curves in the three cases, the diffusion coefficients obtained from the sphere differ markedly from those corresponding to the parallelopiped and ellipsoid. For these last two geometries the diffusion coefficients practically agree with the intrinsic diffusivities obtained for spherical kernels. © 1989, Taylor & Francis Group, LLC. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Shape characterization for diffusional analysis of corn drying |
| Autor: | Tolaba, M.P.; Aquerre, R.J.; Suarez, C. |
| Filiación: | Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428, Buenos Aires, Argentina |
| Palabras clave: | ellipsoid; intrinsic diffusivity; parallelopiped; shape factor |
| Año: | 1989 |
| Volumen: | 7 |
| Número: | 2 |
| Página de inicio: | 205 |
| Página de fin: | 217 |
| DOI: | http://dx.doi.org/10.1080/07373938908916587 |
| Título revista: | Drying Technology |
| Título revista abreviado: | Dry. Technol. |
| ISSN: | 07373937 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07373937_v7_n2_p205_Tolaba |
Referencias:
- Aguerre, R.J., Gabitto, J.F., Chirife, J., Shape factors for the analysis of diffusion in air drying of grain (1987) International Journal of Food Science and Technology, 22, pp. 701-705
- Aris, R., The Mathematical Theory of Diffusion and Reaction in Permeable Catalysis (1975), 1. , Clarendon Press, Oxford; Becker, H.A., Sallans, H.R., A study of internal moistu re movement in the drying of the wheat kernel (1955) Cereal Chemistry, 32, pp. 212-226
- Becker, H.A., A study of diffusion in solids of arbitrary shape, with application to the drying of the wheat kernel (1959) Journal of Applied Polymer Science, 1, pp. 212-226
- Crank, J., The Mathematics of Diffusion (1956), Clarendon Press, Oxford; Fan, L.T., Chu, P.S., Schellenberger, J.A., Diffusion of water in kernels of corn and sorghum (1963) Cereal Chemistry, 40, pp. 303-313
- Gabitto, J., Aguerre, R.J., Heat and mass transfer processes in bodies of non conventional shapes (1986) International Communi cation in Heat and Mass Transfer, 13, pp. 691-700
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- Steffe, J.F., Singh, R.P., Liquid diffusivity of rough rice components (1980) Transactions of the ASAE, 23, pp. 767-782
- Suarez, C., Viollaz, P.E., Chirife, J., Kinetics of soybean drying (1980) Drying 80, 2, pp. 252-255. , (a). Ed. A.S. Mujundar, Hemisphere pub. Corp., Washington
- Suarez, C., Viollaz, P.E., Chirife, J., Diffusional Analysis of air drying of grain sorghum (1980) Journal of Food Technology, 15, pp. 523-531
- Tolaba, M.P., Aguerre, R.J., Unidimensional formulation of Fick's second law for prismatic bodies (1987) International Communication in Heat and Mass Transfer, 14, pp. 333-339
Citas:
---------- APA ----------
Tolaba, M.P., Aquerre, R.J. & Suarez, C. (1989) . Shape characterization for diffusional analysis of corn drying. Drying Technology, 7(2), 205-217.http://dx.doi.org/10.1080/07373938908916587
---------- CHICAGO ----------
Tolaba, M.P., Aquerre, R.J., Suarez, C. "Shape characterization for diffusional analysis of corn drying" . Drying Technology 7, no. 2 (1989) : 205-217.http://dx.doi.org/10.1080/07373938908916587
---------- MLA ----------
Tolaba, M.P., Aquerre, R.J., Suarez, C. "Shape characterization for diffusional analysis of corn drying" . Drying Technology, vol. 7, no. 2, 1989, pp. 205-217.http://dx.doi.org/10.1080/07373938908916587
---------- VANCOUVER ----------
Tolaba, M.P., Aquerre, R.J., Suarez, C. Shape characterization for diffusional analysis of corn drying. Dry. Technol. 1989;7(2):205-217.http://dx.doi.org/10.1080/07373938908916587
