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Abstract:

The drying of a hydroscopic porous solid consisting of two concentric spheres was simulated by means of Fick's second law of diffusion. The resulting mathematical equation and boundary conditions were numerically solved and the numerical solution was used to simulate the drying of two concentric spheres with different shell thicknesses and relative resistances to moisture flow. The model was used to simulate the drying process of corn. From the comparison between theoretically predicted and observed drying curves it was found that the kernel-to-pericarp diffusivities ratio is about 0·1. © 1992.

Registro:

Documento: Artículo
Título:Numerical analysis of the diffusion equation for composite solids: Application to grain drying
Autor:Aguerre, R.J.; Suarez, C.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, (1428) Buenos Aires, Argentina, Argentina
Palabras clave:Diffusion in solids; Drying; Finite difference method; Food products; Mathematical models; Porous materials; Simulation; Composite solids; Concentric spheres; Corn drying; Diffusion equation; Fick's law; Hygroscopic solids; Grain (agricultural product)
Año:1992
Volumen:17
Número:3
Página de inicio:201
Página de fin:215
DOI: http://dx.doi.org/10.1016/0260-8774(92)90069-I
Título revista:Journal of Food Engineering
Título revista abreviado:J Food Eng
ISSN:02608774
CODEN:JFOED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02608774_v17_n3_p201_Aguerre

Referencias:

  • Becker, Sallans, A study of internal moisture movement in the drying of the wheat kernel (1955) Cereal Chemistry, 32, pp. 212-226
  • Chittenden, Hustrulid, Determining drying constants of shelled corn (1966) Transactions of the ASAE, 9, pp. 52-55
  • Chu, Hustrulid, Numerical solution of diffusion equation (1968) Trans. ASAE, 3, pp. 705-708
  • Crank, (1956) The Mathematics of Diffusion, , Clarendon Press, Oxford
  • Crank, Nicholson, A practical method for numerical evaluation of partial differential equation of the heat conduction type (1947) Mathematical Proceedings of the Cambridge Philosophical Society, 43, pp. 50-67
  • Gregg, Sing, (1982) Adsorption Surface Area and Porosity, , 2nd edn., Academic Press, New York
  • Luikov, (1968) Analytical Heat Diffusion Theory, , Academic Press, New York
  • Steffe, Singh, Liquid diffusivity of rough rice components (1980) Transactions of the ASAE, 23, pp. 767-774
  • Suarez, Chirife, Viollaz, Diffusional analysis of air drying of grain sorghum (1980) International Journal of Food Science & Technology, 15, pp. 523-531
  • Tolaba, Suarez, Desorption isotherms of shelled maize whole dehulled and hulls (1990) International Journal of Food Science & Technology, 25, pp. 435-441
  • Tolaba, Suarez, Viollaz, The use of a diffusional model in determining the permeability of corn pericarp (1990) J. Food Engineering, 12, pp. 53-66
  • Vaccarezza, Lombardi, Chirife, Kinetics of moisture movement during air drying of sugar beet root (1974) International Journal of Food Science & Technology, 9, pp. 317-327
  • Walton, White, Ross, A cellular diffusion-based drying model for corn (1988) Trans. ASAE, 31, pp. 279-283

Citas:

---------- APA ----------
Aguerre, R.J. & Suarez, C. (1992) . Numerical analysis of the diffusion equation for composite solids: Application to grain drying. Journal of Food Engineering, 17(3), 201-215.
http://dx.doi.org/10.1016/0260-8774(92)90069-I
---------- CHICAGO ----------
Aguerre, R.J., Suarez, C. "Numerical analysis of the diffusion equation for composite solids: Application to grain drying" . Journal of Food Engineering 17, no. 3 (1992) : 201-215.
http://dx.doi.org/10.1016/0260-8774(92)90069-I
---------- MLA ----------
Aguerre, R.J., Suarez, C. "Numerical analysis of the diffusion equation for composite solids: Application to grain drying" . Journal of Food Engineering, vol. 17, no. 3, 1992, pp. 201-215.
http://dx.doi.org/10.1016/0260-8774(92)90069-I
---------- VANCOUVER ----------
Aguerre, R.J., Suarez, C. Numerical analysis of the diffusion equation for composite solids: Application to grain drying. J Food Eng. 1992;17(3):201-215.
http://dx.doi.org/10.1016/0260-8774(92)90069-I