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Effect of sample size on microwave power absorption within dielectric materials: 2D numerical results vs. closed‐form expressions
Author(s) -
Curet S.,
Rouaud O.,
Boillereaux L.
Publication year - 2009
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.11774
Subject(s) - microwave , microwave heating , dielectric , power (physics) , dielectric heating , materials science , sample (material) , absorption (acoustics) , closed form expression , mechanics , computational physics , optics , thermodynamics , mathematics , physics , mathematical analysis , engineering , optoelectronics , composite material , telecommunications
Abstract This study deals with the analytical and numerical solutions of the heat source term because of microwave heating for high and low dielectric materials in 1D and 2D configurations. The authors compare closed‐form expressions dedicated to microwave power calculation to numerical simulations. A comprehensive and accurate analysis of the microwave power reflected from the surface of the sample is also carried out during microwave heating. The influence of sample length is studied using an original numerical procedure. The study highlights that 1D closed‐form expressions can be extended to 2D configurations in the case of sufficiently high dielectric properties. Examples of heating rate during 2D microwave heating in TE 10 mode are finally presented. © 2009 American Institute of Chemical Engineers AIChE J, 2009