Accession Number : ADP007727

Title :   Computational Techniques in Modeling and Quantifying Microwave Interactions with Materials,

Corporate Author : UTAH UNIV SALT LAKE CITY DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Iskander, M. F. ; Andrade, O. ; Kimrey, H. ; Smith, R. ; Lamoreaux, S.

Report Date : 27 APR 1992

Pagination or Media Count : 18

Abstract : Computational techniques and numerical modeling are expected to play a significant role in developing the area of microwave sintering of ceramics. There is no doubt that before the full commercial utilization of this technology, detailed understanding of the basic nature of the microwave interactions with materials as a function of frequency, geometry, and temperature must be developed. Tradeoffs between the use of single- and multi-mode cavities should be clearly understood and the shapes and sizes of ceramic samples suitable for this technology must be identified. To this end, numerical techniques may help in a wide variety of ways including modeling realistic sintering experiments, the development of a basic understanding of the physical and geometrical aspects of microwave interactions with materials, and in the development of an expert system that integrates simulation and analysis software with the developing human expertise and material data base. This paper describes roles that may be played by computational techniques and software tools in the area of sintering of ceramics. In particular, a simulation software package based on the Finite-Difference Time-Domain (FDTD) method will be discussed. The CAEME (Computer Applications in Electromagnetics Education) software for EM education/training will be described and the advantages of developing an expert software system that emulates humans by logically performing tasks, accessing simulation software, and by interfacing with dielectric and thermal materials data bases will be described. Example results of simulated sintering experiments in single-mode cavities are also presented.

Descriptors :   *MICROWAVES, *SINTERING, *CERAMIC MATERIALS, *COMPUTERIZED SIMULATION, CAVITIES, COMPUTER APPLICATIONS, COMPUTERS, DATA BASES, DIELECTRICS, EDUCATION, EXPERT SYSTEMS, FREQUENCY, FUNCTIONS, GEOMETRY, HUMANS, INTERACTIONS, MATERIALS, PAPER, RECREATION, SIMULATION, TEMPERATURE, TIME, TIME DOMAIN, TOOLS, TRAINING, UTILIZATION, MATHEMATICAL MODELS, HEATING, MAXWELLS EQUATIONS, THERMAL INSULATION, SYMPOSIA.

Subject Categories : Ceramics, Refractories and Glass
      Radiofrequency Wave Propagation
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE