Experimental and numerical study of microwave drying in unsaturated porous material

Ratanadecho, Phadungsak; Aoki, Kazuo; Akahori, Masatoshi

doi:10.1016/s0735-1933(01)00265-2

Cited by 62 publications

(29 citation statements)

References 9 publications

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“…The transport mechanisms involved in the microwave drying of unsaturated porous material are: liquid flow due to capillary pressure gradient and gravity, and vapor flow due to the partial pressure gradient. 61,62 Figure 7 depicts the analytical model for the microwave drying process. 61 The assumptions involved in the transport model are that the capillary porous material is rigid with no chemical reactions occurring in the sample, local thermodynamic equilibrium prevails, simultaneous heat, and mass transfer occur at constant pressure and nonthermal microwave effects are negligible.…”

Section: 14mentioning

confidence: 99%

“…61,62 Figure 7 depicts the analytical model for the microwave drying process. 61 The assumptions involved in the transport model are that the capillary porous material is rigid with no chemical reactions occurring in the sample, local thermodynamic equilibrium prevails, simultaneous heat, and mass transfer occur at constant pressure and nonthermal microwave effects are negligible. The mass conservation equations for liquid, water vapor, air, and gas phases are written as…”

Section: 14mentioning

confidence: 99%

“…[29][30][31][32][33][34][35] for microwave heating of unsaturated porous material can be solved by using finite difference method. 61 …”

Section: 14mentioning

confidence: 99%

“…67 Time-Dependent Analysis of Maxwell's Equations-Test Studies. Rattanadecho and coworkers [13][14][15]43,61,77 had carried out various experimental and numerical studies on microwave heating of materials using TE 10 mode rectangular waveguide and domestic microwave oven. Maxwell's equations (Eqs.…”

Section: -75mentioning

confidence: 99%

“…Case 1: Microwave Heating of Unsaturated Porous Medium. Ratanadecho et al 61,135,136 carried out experimental and theoretical analysis of drying of capillary porous packed bed of glass by microwaves using a rectangular waveguide. Their analysis was based on the strong coupling between the heating model and electromagnetic model with effective dielectric properties of the unsaturated porous bed.…”

Section: 127mentioning

confidence: 99%

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Microwave material processing—a review

2011

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Microwave heating is caused by the ability of the materials to absorb microwave energy and convert it to heat. This article represents a review on fundamentals of microwave heating and their interaction with materials for various applications in a comprehensive manner. Experimental studies of single, multimode, and variable frequency microwave processing were reviewed along with their applications. Modeling of microwave heating based on Lambert's law and Maxwell's electromagnetic field equations have also been reviewed along with their applications. Modeling approaches were used to predict the effect of resonances on microwave power absorption, the role of supports for microwave heating, and to determine the nonuniformity on heating rates. Various industrial applications on thermal processing have been reviewed. There is tremendous scope for theoretical and experimental studies on the athermal effects of microwaves. Some of the unresolved problems are identified and directions for further research are also suggested.

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Section: 14mentioning

confidence: 99%