Shape characterization for diffusional analysis of corn drying

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...

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Detalles Bibliográficos
Autor principal: Tolaba, Marcela Patricia
Publicado: 1989
Materias:
ellipsoid
intrinsic diffusivity
parallelopiped
shape factor
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07373937_v7_n2_p205_Tolaba
http://hdl.handle.net/20.500.12110/paper_07373937_v7_n2_p205_Tolaba
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_07373937_v7_n2_p205_Tolaba
record_format dspace
spelling paper:paper_07373937_v7_n2_p205_Tolaba2023-06-08T15:44:17Z Shape characterization for diffusional analysis of corn drying Tolaba, Marcela Patricia ellipsoid intrinsic diffusivity parallelopiped shape factor 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. Fil:Tolaba, M.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1989 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07373937_v7_n2_p205_Tolaba http://hdl.handle.net/20.500.12110/paper_07373937_v7_n2_p205_Tolaba
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic ellipsoid
intrinsic diffusivity
parallelopiped
shape factor
spellingShingle ellipsoid
intrinsic diffusivity
parallelopiped
shape factor
Tolaba, Marcela Patricia
Shape characterization for diffusional analysis of corn drying
topic_facet ellipsoid
intrinsic diffusivity
parallelopiped
shape factor
description 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.
author Tolaba, Marcela Patricia
author_facet Tolaba, Marcela Patricia
author_sort Tolaba, Marcela Patricia
title Shape characterization for diffusional analysis of corn drying
title_short Shape characterization for diffusional analysis of corn drying
title_full Shape characterization for diffusional analysis of corn drying
title_fullStr Shape characterization for diffusional analysis of corn drying
title_full_unstemmed Shape characterization for diffusional analysis of corn drying
title_sort shape characterization for diffusional analysis of corn drying
publishDate 1989
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07373937_v7_n2_p205_Tolaba
http://hdl.handle.net/20.500.12110/paper_07373937_v7_n2_p205_Tolaba
work_keys_str_mv AT tolabamarcelapatricia shapecharacterizationfordiffusionalanalysisofcorndrying
_version_ 1768544507312209920

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