关键词: 射频加热, 计算机模拟, 肉类, 电压

Abstract: Because experiment could not obtain voltage between 2 electrode plates needed for radio RF thawing finite element in simulation, this paper used COMSOL Multiphysics software to study 3 different voltages (fixed voltage, experimental anode voltage, and theoretically derived voltage) for simulating RF defrosting frozen beef samples in 3 sizes （Little: 160 mm×102 mm×60 mm；Middle：220 mm×140 mm×60 mm；Large：285 mm×190 mm×60 mm）, and then compared the effectiveness of the voltage selection for heating rate and temperature distribution between the simulated and actual results. The results showed that the experimental anode voltage and fixed voltage were close to each other in the range of 7.2~8 kV. But the theoretically derived voltage was the highest among all, about 9.2~10.7 kV. The simulated result was mostly close to the experimental results, when selecting 70%~80% of the theoretically deducted value as the input voltage for computer simulation. This research conclusion could provide reference for obtaining input parameter of accurate simulate RF thawing process.

Key words: radio-frequency heating, computer simulation, meat, voltage