Scholarly
    Communications Project


Document Type:Master's Thesis
Name:Craig Carl Goodson
Email address:cgoodson@vt.edu
URN:1997/00556
Title:Simulation of Microwave Heating of Mullite Rods
Degree:Master of Science
Department:Mechanical Engineering
Committee Chair: James R. Thomas Jr.
Chair's email:jthomas@vt.edu
Committee Members:Elaine P. Scott
William A. Davis
Keywords:microwave, heat, mullite, dielectric loss
Date of defense:December 11, 1997
Availability:Release the entire work immediately worldwide.

Abstract:

Simulation of Microwave Heating of Mullite Rods by Craig Carl Goodson Dr. James R. Thomas, Jr., Chairman Mechanical Engineering Microwave processing has been studied as an alternate heating technique over conventional heating for industrial applications. Some advantages include quicker and more uniform heating. Also, microwave energy offers the advantage of localized heating and smaller-sized equipment. Many ceramics, however, are difficult to heat using microwave energy by reason of the strong temperature dependence of the dielectric loss. The ability of a ceramic to absorb microwave energy, a measure of its dielectric loss, increases with temperature which makes the material more susceptible to thermal runaway. The purpose of this research is to develop a model that accurately reproduces experimental data and can be used to explore new applicator designs for continuous processing of such ceramics. A two-dimensional numerical model, created for this purpose, assumes that the ceramic is a circular cylinder that moves either longitudinally through a microwave cavity of given dimensions. By adjusting the electromagnetic field so that the absorbed power matches the measured power, the model successfully imitates experimental results and avoids thermal runaway while achieving high temperatures.

List of Attached Files

abstract.PDF acknowl.PDF append1.PDF
append2.PDF cgtitle_p.PDF ch1.PDF
ch10.PDF ch2.PDF ch3.PDF
ch4.PDF ch5.PDF ch6.PDF
ch7.PDF ch8.PDF ch9.PDF
list-fig.PDF tab-cont.PDF vita.PDF


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