Temperature redistribution modelling during intermittent microwave convective heating
2014
Kumar, Chandan | Joardder, M. U. H. | Karim, A. | Millar, G. J. | Amin, Z. | Al Nur, M. | Ali, M. A.
Microwave power is used for heating and drying processes because of its faster and volumetric heating capability. Nonuniformtemperature distributionduring microwaveapplication is a major drawbackof these processes. Intermittent application of microwavepotentially reduces the impact of non-uniformity and improves energy efficiencyby redistributing the temperature.However, temperature re-distribution during intermittent microwave heating has not been investigated adequately. Consequently, in this study, a coupled electromagnetic with heat and mass transfer model was developed using the finite element methodembedded in COMSOL-Multyphysics software. Particularly, the temperature redistribution due to intermittent heating was investigated. A series of experiments were performed to validate the simulation. The test specimen was an apple and the temperature distribution was closely monitored by a TIC (Thermal Imaging Camera). The simulated temperature profilematched closely with thermal images obtained from experiments. © 2014 The Authors. Published by Elsevier Ltd.
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