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Finite Element Analysis of Nonlinear Water Diffusion During Rice Soaking
Author(s) -
ZHANG TAINYI,
BAKSHI A. S.,
GUSTAFSON R. J.,
LUND D. B.
Publication year - 1984
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1984.tb13719.x
Subject(s) - thermal diffusivity , mass diffusivity , moisture , diffusion , finite element method , water content , nonlinear system , mass transfer , materials science , chemistry , thermodynamics , composite material , physics , chromatography , geotechnical engineering , geology , quantum mechanics
The formulation of a finite element model is described that could be used to analyze water diffusion during rice soaking with concentration dependent diffusivity and change in the size of rice. The rice is divided into 135 elements and moisture distribution with time is calculated. Knowing the moisture absorbed by each element, the nodal displacements are obtained by minimizing the potential energy of the system. Average mass diffusivity of milled rice decreased from 6.4 × 10 −7 to 3.0 × 10 −7 m 2 /hr as the moisture content increased from 13 to 50%. The density and concentration dependent mass diffusivity model adequately described experimental data.