E124 Three-dimensional Analysis of Microwave Heating Using a Rectangular Wave Guide

The heating of multi-layered materials by microwave heating with rectangular wave guide has been investigated numerically and experimentally. The multi-layered materials, which consist of the layer of higher dielectric material (antireflection layer) and lower dielectric material (sample), have the convergent effect of the incident microwave in sample, and it can change the heating pattern in the sample with ease. In this study, the effect of an antireflection layer thickness on the heating process is clarified in detail, considering the interference between incidents and reflected waves in the dielectric materials. Based on a model combining the Maxwell and heat transport equations, the results showed that when a layer of lower dielectric material is attached in front of sample, the microwave energy absorbed and distribution of temperature within the sample are enhanced. The predicted results are in agreement with experimental results for microwave heating of multi-layered materials using a rectangular wave guide.

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A numerical and experimental investigation of the modeling of microwave heating for liquid layers using a rectangular wave guide (effects of natural convection and dielectric properties)

Applied Mathematical Modelling ◽

10.1016/s0307-904x(01)00046-4 ◽

2002 ◽

Vol 26 (3) ◽

pp. 449-472 ◽

Cited By ~ 91

Author(s):

P. Ratanadecho ◽

K. Aoki ◽

M. Akahori

Keyword(s):

Experimental Investigation ◽

Natural Convection ◽

Dielectric Properties ◽

Microwave Heating ◽

Wave Guide ◽

Rectangular Wave

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Experimental analysis of microwave heating of dielectric materials using a rectangular wave guide (MODE: TE10) (Case study: Water layer and saturated porous medium)

Experimental Thermal and Fluid Science ◽

10.1016/j.expthermflusci.2008.11.008 ◽

2009 ◽

Vol 33 (3) ◽

pp. 472-481 ◽

Cited By ~ 43

Author(s):

Waraporn Cha-um ◽

Phadungsak Rattanadecho ◽

Watit Pakdee

Keyword(s):

Porous Medium ◽

Microwave Heating ◽

Experimental Analysis ◽

Saturated Porous Medium ◽

Water Layer ◽

Dielectric Materials ◽

Wave Guide ◽

Rectangular Wave ◽

Guide Mode

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Experimental and Numerical Analysis of Microwave Heating of Water and Oil Using a Rectangular Wave Guide: Influence of Sample Sizes, Positions, and Microwave Power

Food and Bioprocess Technology ◽

10.1007/s11947-009-0187-x ◽

2009 ◽

Vol 4 (4) ◽

pp. 544-558 ◽

Cited By ~ 25

Author(s):

W. Cha-um ◽

P. Rattanadecho ◽

W. Pakdee

Keyword(s):

Numerical Analysis ◽

Microwave Heating ◽

Microwave Power ◽

Wave Guide ◽

Sample Sizes ◽

Rectangular Wave

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In situ investigation of the primary recrystallization of alpha titanium in HVEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100110313 ◽

1978 ◽

Vol 36 (1) ◽

pp. 634-635

Author(s):

S. Naka ◽

R. Penelle ◽

R. Valle

Keyword(s):

Dimensional Analysis ◽

Texture Evolution ◽

Cold Work ◽

Three Dimensional ◽

Primary Recrystallization ◽

Thin Foils ◽

In Situ Investigation ◽

Grain Growth Model ◽

Alpha Titanium

The in situ experimentation technique in HVEM seems to be particularly suitable to clarify the processes involved in recrystallization. The material under investigation was unidirectionally cold-rolled titanium of commercial purity. The problem was approached in two different ways. The three-dimensional analysis of textures was used to describe the texture evolution during the primary recrystallization. Observations of bulk-annealed specimens or thin foils annealed in the microscope were also made in order to provide information concerning the mechanisms involved in the formation of new grains. In contrast to the already published work on titanium, this investigation takes into consideration different values of the cold-work ratio, the temperature and the annealing time.Two different models are commonly used to explain the recrystallization textures i.e. the selective grain growth model (Beck) or the oriented nucleation model (Burgers). The three-dimensional analysis of both the rolling and recrystallization textures was performed to identify the mechanismsl involved in the recrystallization of titanium.

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