论文信息 - Finite element simulation of drying of agricultural products with volumetric changes

Finite element simulation of drying of agricultural products with volumetric changes

Abstract The kinetics of drying fruit and vegetable foodstuffs are studied using a three-dimensional finite element model. The heat transfer effect is taken into account using an overall heat balance. The shrinkage of the sample during drying is also included in the system of equations. Two types of elements are used for the representation of the three-dimensional domain: the right hexahedral prism and the triangular prism. The model predicts accurately the experimental moisture content of fruits and vegetables. Literature values for the diffusion coefficient and the activation energy of diffusion agree well with those obtained by the finite element model.

D. Marinos-Kouris | G. Vagenas | D. Marinos-Kouris | G. K. Vagenas

[1] Martin R. Okos,et al. Non-Equilibrium Thermodynamics Approach to Heat and Mass Transfer in Corn Kernels , 1981 .

[2] Pedro I. Alvarez,et al. A SEMI-THEORETICAL MODEL FOR THE DRYING OF THUMPSON SEEDLESS GRAPES , 1986 .

[3] Theodore P. Labuza,et al. Air Drying Characteristics of Apricots , 1987 .

[4] Zacharias B. Maroulis,et al. Water sorption isotherms of raisins, currants, figs, prunes, and apricots , 1990 .

[5] Luis M. Vaccarezza,et al. Heat transfer effects on drying rate of food dehydration , 1974 .

[6] James H. Young,et al. Numerical solution of simultaneous moisture diffusion and shrinkage during soybean drying. , 1980 .

[7] D. Marinos-Kouris,et al. AN ANALYSIS OF MASS TRANSFER IN AIR-DRYING OF FOODS , 1990 .

[8] Antonio Mulet,et al. DRYING OF CARROTS. I. DRYING MODELS. , 1989 .

[9] Antonio Mulet,et al. DRYING OF CARROTS. II. EVALUATION OF DRYING MODELS , 1989 .

[10] Norman R. Draper,et al. Applied regression analysis (2. ed.) , 1981, Wiley series in probability and mathematical statistics.

[11] R. Gane. The water relations of some dried fruits, vegetables and plant products , 1950 .

[12] G. Saravacos. Effect of the Drying Method on the Water Sorption of Dehydrated Apple and Potato , 1967 .

[13] R. Gustafson,et al. Finite Element Analysis of Nonlinear Water Diffusion During Rice Soaking , 1984 .

[14] M. J. Urbicain,et al. Kinetics of the approach to sorptional equilibrium by a foodstuff , 1983 .