Fixed-bed drying simulation of agricultural products using a new backward finite difference scheme

Dalpasquale, Valdecir Antoninho; Sperandio, Décio; Silva, Luiz Henry Monken e; Kolling, Evandro Marcos

doi:10.1016/j.amc.2007.11.029

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…The numerical procedure for the MSU model relies on an explicit method of finite differences, which requires certain stability conditions between the step sizes of the time and space variables. In contrast to the above models, Dalpasquale et al [6] established a stabile implicit method based on backward finite differences, in both space and time variables, taking into account some specific empirical aspects of packed-bed drying.…”

Section: Introductionmentioning

confidence: 98%

Numerical Study of Convective Water Desorption from the Polystyrene Cation Resin CG‐8

2011

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A mathematical model was developed to evaluate the influence of structural and operational factors on convective desorption processes (desorption of a liquid from capillary-porous material). The possibility to utilize this model for the case of water desorption from the polystyrene cation resin CG-8 is presented. The model accounts for unsteady one-dimensional simultaneous heat and mass transfer between the gas (humid air) and the solid phase (CG-8 resin). The identification of effective transport properties for the considered packed bed of material (CG-8 resin) is discussed. To this purpose, data from the literature are used.

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Section: Introductionmentioning

confidence: 98%

Numerical Study of Convective Water Desorption from the Polystyrene Cation Resin CG‐8

2011

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“…Drying is a simultaneous process of heat and mass transfer between the product, which loses moisture, and the drying air, which provides energy (Dalpasquale, Sperandio, Monken e Silva, & Kolling, 2008). Field drying can cause grain quality loss, with insects and fungi infestation, and even increase the levels of mycotoxins in grains (Kaaya, Warren, Kyamanywa, & Kyamuhangire, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of drying methods and temperatures on protein, pasting, and thermal properties of white floury corn

Timm

Lang

Ramos

et al. 2020

J. Food Process. Preserv.

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Drying is a simultaneous process of heat and mass transfer between the product, which loses moisture, and the drying air, which provides energy (Dalpasquale, Sperandio, Monken e Silva, & Kolling, 2008). Field drying can cause grain quality loss, with insects and fungi infestation, and even increase the levels of mycotoxins in grains (Kaaya, Warren, Kyamanywa, & Kyamuhangire, 2005). High drying temperatures can reduce corn quality after storage. Some studies have showed that drying temperatures above 70 °C reduces the solubility of proteins, modify the pasting properties of starch, and can denature enzymes, such as lipase (Kaur, Whitson,

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“…The numerical procedure for the MSU model relies on an explicit method of finite differences, which requires certain stability conditions between the step sizes of the time and space variables. In contrast to previous work, Dalpasquale et al (2008) established a stable implicit method based on backward finite differences, in both space and time variables, taking into account some specific empirical aspects of fixed-bed drying.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on hygroscopic material drying in packed bed

Stakić

Banjac

Urošević

2011

Braz. J. Chem. Eng.

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-The paper addresses numerical simulation for the case of convective drying of hygroscopic material in a packed bed, analyzing agreement between the simulated and the corresponding experimental results. In the simulation model of unsteady simultaneous one-dimensional heat and mass transfer between gas phase and dried material, it is assumed that the gas-solid interface is at thermodynamic equilibrium, while the drying rate of the specific product is calculated by applying the concept of a "drying coefficient". Model validation was done on the basis of the experimental data obtained with potato cubes. The obtained drying kinetics, both experimental and numerical, show that higher gas (drying agent) velocities (flow-rates), as well as lower equivalent grain diameters, induce faster drying. This effect is more pronounced for deeper beds, because of the larger amount of wet material to be dried using the same drying agent capacity.

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Fixed-bed drying simulation of agricultural products using a new backward finite difference scheme

Cited by 10 publications

References 1 publication

Numerical Study of Convective Water Desorption from the Polystyrene Cation Resin CG‐8

Numerical Study of Convective Water Desorption from the Polystyrene Cation Resin CG‐8

Effects of drying methods and temperatures on protein, pasting, and thermal properties of white floury corn

Numerical study on hygroscopic material drying in packed bed

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