Micro to mesoscale temperature gradients in microwave heated energetic materials

被引：0
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作者：
20143418088890
机构：
[1] Perry, William Lee
[2] Higginbotham Duque, Amanda L.
来源：
Perry, W.L. (wperry@lanl.gov) | 1600年 / American Institute of Physics Inc.卷 / 116期
关键词：
Temperature gradients will appear in any microwave-heated heterogeneous system where there is contrast in the complex permittivity of the constituent materials. The magnitude of the gradients depends on several factors that include the permittivity; thermal conductivity; length scale; and thermal diffusivity. In general; it is challenging to measure the absolute temperature accurately in a strong microwave field; the presence of large gradients can further complicate the interpretation of temperature measurements. These issues are especially important during the microwave heating of highly exothermic chemical reaction systems; such as those containing explosives or propellants. It was therefore the intent of this work to theoretically and numerically investigate the nature of microwave-induced thermal gradients in energetic systems over a wide range of length scales; primarily for the purpose of interpreting temperature measurement. © 2014 AIP Publishing LLC;
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