Journal
JOURNAL OF ENGINEERING MATHEMATICS
Volume 114, Issue 1, Pages 65-86Publisher
SPRINGER
DOI: 10.1007/s10665-018-9982-6
Keywords
Microwave heating; Photonic crystal; Thermal runaway
Funding
- Air Force Office of Scientific Research [FA9550-15-0476]
- National Science Foundation MRI Grant [DMS-1337943]
- AFOSR Award [FA9550-15-0476]
- NSF MRI Grant [DMS-1337943]
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Beamed energy transport requires the use of heat exchangers to collect the thermal energy produced from the absorption of electromagnetic radiation. To explore the high-frequency effects of wave-geometry interactions on this heat transfer, we consider a central dielectric layer, possessing a temperature-dependent loss factor, surrounded by two fluid channels filled with a lossless dielectric fluid. Considering an asymptotically thin domain, we derive a diffusion-reaction equation, assuming no flow in the fluid. We show that the high-frequency effects generate a new energy balance leading to a previously unknown steady-state solution. A characterization of the steady-state-dependent parameters is performed in an effort to determine a mechanism to control the nonlinear heating. Diffusive effects are shown to produce regions of the power response where steady-state solutions are replaced by traveling-wave solutions. These regions are also location to the greatest heating efficiency. Analytical approximations to the wave speed and location of these regions are found using boundary layer theory.
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