为提高酱卤肉制品微波加热的均匀性,该文提出采用旋转过程中叠加翻转运动的方式使肉制品上下层吸收模式发生改变,并借助COMSOL Multiphysics仿真软件对电磁场与传热等三维多物理场进行了耦合数值模拟,构建了旋转叠加翻转的几何运动仿真模型。在此基础上,通过将微波加热过程中电场分布、温度分布和电磁功率损耗密度状态可视化,解析了翻转运动改善肉制品在微波场中加热均匀性的规律。结果表明,该研究所构建的仿真模型预测值与实际测量值高度吻合,均方根误差值低于5%,表明该模型能有效反映微波加热时旋转叠加翻转对肉制品升温效果的影响。从模型的温度场拟合结果来看,翻转前后肉制品的温度均匀系数增大并趋于稳定,同时热区分布值降低,说明翻转运动可以有效改善微波热量过于集中的情况;从模型的电场拟合结果来看,翻转运动可以改善肉制品上下层的电场分布均匀性,促进微波能均匀吸收,避免产生边角集中效应。因此,多物理场仿真模型能有效反映旋转叠加翻转运动对肉制品微波加热效果的影响,且仿真结果表明转叠加翻转运动可明显改善肉制品的微波加热效果。
To improve the uniformity of microwave heating of sauce-marinated meat products, this paper suggested altering the absorption mode of the upper and lower layers of meat products during microwave heating via a rotating and superimposed flipping motion.Three-dimensional multiphysics, including heat transfer and electromagnetic field, were coupled numerically simulated with the assistance of the COMSOL Multiphysics simulation software.Additionally, a geometric motion simulation model encompassing superimposed flipping and rotating was constructed.The visualization encompassed the assessment of the regularity of a flipping motion that enhances the uniformity of meat products heated in a microwave field, as well as the distribution of electric field, temperature, and electromagnetic power loss density throughout the microwave heating process.With a root mean square error value of less than 5%, the results indicated that the predicted values of the simulation model developed in this study were extremely consistent with the actual measured values.This suggested that the model could accurately represent the impact of rotating and superimposed flipping on the temperature rise effect of meat products when heated in the microwave.The model’s temperature field fitting results revealed that the temperature uniformity coefficient of meat products increased and stabilized before and following flipping.Conversely, the distribution value of the hot zone decreased, suggesting that the flipping motion could effectively ameliorate the microwave heat concentration situation.According to the results of the model’s electric field fitting, the implementation of a flipping motion had the potential to enhance the consistency of electric field distribution between the upper and lower layers of meat products, facilitate the uniform absorption of microwave energy, and prevent the corner concentration effect from occurring.In light of this, the simulation results indicated that rotating and superimposed flipping motion could substantially enhance the microwave heating effect of meat products, and the multiphysics simulation model could therefore accurately represent the effect of such motion.
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