Numerical simulation of the drying of a deformable material: evaluation of the diffusion coefficient

We are interested in the simulation of heat and mass transfer processes accompanying the drying of a deformable agricultural product. We have used an implicit method with classical finite differences to resolve the set of equations. The identification of the diffusion coefficient within a thin carro...

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Bibliographic Details
Published in:Drying technology 1995, Vol.13 (8/9), p.1789-1805
Main Authors: Ben Mabrouk, S. (INRST, Hammam-Lif, Tunisia.), Belghith, A
Format: Article
Language:English
Subjects:
CAROTTE
carrot drying
CARROTS
CHEMICOPHYSICAL PROPERTIES
diffusion coefficients
DIFFUSIVITY
DRYING
drying kinetics
ECHANGE THERMIQUE
finite differences
FOOD TECHNOLOGY
heat and mass transfer
HEAT TRANSFER
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
MERMA
MODELE MATHEMATIQUE
MODELOS MATEMATICOS
PROPIEDADES FISICO-QUIMICAS
PROPRIETE PHYSICOCHIMIQUE
RETRAIT
SECADO
SECHAGE
SHRINKAGE
SIMULACION
SIMULATION
TECHNOLOGIE ALIMENTAIRE
TECNOLOGIA DE LOS ALIMENTOS
TRANSFERENCIA DE MASA
TRANSFERENCIA TERMICA
TRANSFERT DE MASSE
ZANAHORIA
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Summary:We are interested in the simulation of heat and mass transfer processes accompanying the drying of a deformable agricultural product. We have used an implicit method with classical finite differences to resolve the set of equations. The identification of the diffusion coefficient within a thin carrot layer is carried by trial and error on two analytical forms. These two forms take into account moisture content, temperature and shrinkage of the product. The drying rates of thin layer of carrot pieces are measured in a laboratory tunnel dryer. These drying curves are established by varying some airflow parameters such as velocity, temperature and relative humidity. The internal and surface temperature of the slab were recorded by means of therrnosensors. The simulated solutions are in agreement with the experimental results.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373939508917051