Modeling of nonisothermal heat and moisture transfer in capillary-porous media in periodic microwave heating

Grinchik, N. N.; Akulich, P. V.; Адамович, А. Л.; Kuts, P. S.; Kundas, Semjon

doi:10.1007/s10891-007-0001-4

Cited by 12 publications

(3 citation statements)

References 5 publications

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“…The dependent variables of the model are most often temperature and moisture content (in the form of liquid and vapor phases) that are averaged over the volume of a material, as well as, less often, total pressure. In [15,16], the mathematical models of drying were developed and the problems of drying are studied using equations for two-phase filtration and equations for sorption isotherms.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Heat and Mass Transfer in the Drying of Granules Used as a Support for a Nickel Catalyst

Kosheleva

Мешалкин

Dornyak

2021

Theor Found Chem Eng

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The results of studying the convective drying of cylindrical granules of a support for a nickel catalyst using mathematical modeling techniques have been presented. A mathematical model for intensive heat and mass transfer in a granule has been formulated that makes it possible to choose the efficient regimes of convective drying. The specific feature of the mathematical model is the analytical calculation of local mass transfer coefficients for a liquid taking into account the sorption properties of a material, a permeability coefficient, the local values of the moisture content, and temperature. Comparison of the results of mathematical modeling of heat and mass transfer in granules and the data of a laboratory experiment has shown that they are in satisfactory agreement.

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Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of Heat and Mass Transfer in the Drying of Granules Used as a Support for a Nickel Catalyst

Kosheleva

Мешалкин

Dornyak

2021

Theor Found Chem Eng

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“…Implementation of the l → g phase transi tions with a radiation selective absorption by a "suit able" component is a physical basis for various tech nological processes: drying of capillary porous media, evaporation of solvents from solid carriers, sintering of powder materials, underground gasification of hydro carbons, dissociation of natural gas hydrates, etc. [1][2][3][4][5][6][7][8][9]. A theory of the phase transformations, initiated by microwave heating in the regime of heated medium clearing, has been developed in the present work.…”

Section: Introductionmentioning

confidence: 99%

Modeling of heat and mass transfer in porous media at phase transitions initiated by microwave heating

2014

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A model of the three dimensional "condensed phase → gas" phase transition in a porous medium upon heating by microwave electromagnetic radiation is proposed. It is shown on the basis of the model the oretical analysis that the distributions of condensed phase saturation and radiation intensity are in the form of quasi stationary waves and the pressure distribution is determined by the criterion parameter, which is the ratio of two characteristic mass flow rates of the gas due to the phase transition and filtration. It is found on the basis of numerical implementation of the model that there are three regions in the porous medium in the general case: a region of condensed phase heating, a region of phase transition, and a region of gas phase heating.

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“…Heat transfer phenomena in the absence of significant mass transfer have been studied extensively in order to calculate the distribution of temperature across a dielectrically heated volumetrically by microwave energy [3]. Many scholars do a lot of researches of the temperature changes within wood according to the characteristics of wood microwave heating [4][5][6] Antti A.L. [7]studied the change rule of temperature within wood during microwave drying.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Conditions on the Temperature Changes inside the Wood during Microwave Heating

Jian

Sun

et al. 2011

AMR

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In this study, the effects of microwave radiation intensity, initial moisture content and thickness on the properties of temperature development in Siberian Elm wood samples during the microwave drying have been investigated using a tailor made microwave drying equipment. The results show that with the increase of microwave radiation intensity and a decrease in initial moisture content and thickness, both the temperature and its rate of increase in wood rise rapidly. In the microwave drying, the temperature development curve presented three stages of variation: a sharp increase in temperature − a constant temperature − a slow warm-up.

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Modeling of nonisothermal heat and moisture transfer in capillary-porous media in periodic microwave heating

Cited by 12 publications

References 5 publications

Mathematical Modeling of Heat and Mass Transfer in the Drying of Granules Used as a Support for a Nickel Catalyst

Mathematical Modeling of Heat and Mass Transfer in the Drying of Granules Used as a Support for a Nickel Catalyst

Modeling of heat and mass transfer in porous media at phase transitions initiated by microwave heating

Effects of the Conditions on the Temperature Changes inside the Wood during Microwave Heating

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