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TECHNICAL NOTES

Experimental Validation of a Combined Electromagnetic and Thermal Model for a Microwave Heating of Multi-Layered Materials Using a Rectangular Wave Guide

[+] Author and Article Information
P. Rattanadecho, K. Aoki, M. Akahori

Department of Mechanical Engineering, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka, Niigata, 940-2188, Japan

J. Heat Transfer 124(5), 992-996 (Sep 11, 2002) (5 pages) doi:10.1115/1.1495521 History: Received October 10, 2001; Revised April 22, 2002; Online September 11, 2002
Copyright © 2002 by ASME
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References

Ettenberg,  M., 1985, “Microwave Hypothermia and Radiometry: One-Dimensional Computer Models,” RCA Rev., 46, pp. 510–527.
Gori,  F., Gentili,  G., and Matini,  L., 1987, “Microwave Heating of Porous Media,” ASME J. Heat Transfer, 109, pp. 522–525.
Nikawa,  Y., Katsumata,  T., Kikuchi,  M., and Mori,  S., 1986, “An Electric Field Converging Applicator with Heating Pattern Controller for Microwave Hyperthermia,” IEEE Trans. Microwave Theory Tech., 34(5), pp. 631–635.
Ayappa,  K. G., Davis,  H. T., Davis,  E. A., and Gordon,  J., 1991, “Analysis of Microwave Heating of Materials with Temperature-Dependent Properties,” AIChE J., 37, pp. 313–322.
Lin, J. C., and Gandhi, Om P., 1996, “Computer Methods for Predicting Field Intensity,” Handbook of Biological Effects of Electromagnetic Fields, 2nd ed., Polk and Postow, eds., CRC Press, Boca Raton, FL.
Ratanadecho,  P., Aoki,  K., and Akahori,  M., 2002, “Influence of Irradiation Time, Particle Sizes and Initial Moisture Content During Microwave Drying of Multi-Layered Capillary Porous Materials,” ASME J. Heat Transfer, 124, pp. 151–161.
Ratanadecho,  P., Aoki,  K., and Akahori,  M., 2002, “The Characteristics of Microwave Melting of Frozen Packed Bed Using a Rectangular Wave Guide,” IEEE Trans. Microwave Theory Tech., pp. 1487–1494.
Von Hippel, A. R., 1954, Dielectric Materials and Applications, MIT Press, Boston.
Wang,  J., and Schmugge,  T., 1980, “An Empirical Model for the Complex Dielectric Permittivity of Soil as a Function of Water Content,” IEEE Trans. Geosci. Remote Sens., GE-18(4), pp. 288–295.

Figures

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Schematic of experimental facility
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Variation of the reflection rate versus thickness of antireflection layer
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Distribution of electric field in case without antireflection layer on the sample
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Distribution of electric field in the case that antireflection layer is attached on the sample (δ=32 mm)
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Distribution of electric field in case that antireflection layer is attached on the sample (δ=16 mm)
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Temperature distributions as a parameter of thickness of antireflection layer
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Temperature distributions in case that antireflection layer (δ=16 mm) is attached on the sample
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Comparison between simulated results (a) and experimental results (b) for microwave heating in the case that antireflection layer is attached on the sample (δ=16 mm., t=30 s): (a) simulated temperature distributions (Units: °C); and (b) measured temperature distributions (Units: °C).

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