Temperature redistribution modelling during intermittent microwave convective heating
Kumar, Chandan, Joardder, Mohammad Uzzal Hossain, Karim, Azharul, Millar, Graeme J., & Amin, Zakaria Mohd (2014) Temperature redistribution modelling during intermittent microwave convective heating. Procedia Engineering, 90, pp. 544-549.
Microwave power is used for heating and drying processes because of its faster and volumetric heating capability. Non-uniform temperature distribution during microwave application is a major drawback of these processes. Intermittent application of microwave potentially reduces the impact of non-uniformity and improves energy efficiency by 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 method embedded 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 profile matched closely with thermal images obtained from experiments.
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