Establishment of a Heat Transfer Model of Silver Carp Muscle during Freezing and Experimental Verification
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Abstract:
Accurate simulation of the freezing process and prediction of freezing time are important for the design and control of freezing devices and assurance of product quality. Based on the prediction model of thermophysical parameters and an enthalpy-based mathematical model for silver carp muscle, a finite difference method was adopted to establish a physical model for flat silver carp muscle. The freezing process and freezing time for the thermal center and boundary layer of the silver carp muscle were also predicted. The results showed that the mean sums of squared differences between the simulated value and experimental data of the thermal center and boundary layer of the silver carp muscle with a thickness of 44 mm were 1.85 and 1.30, respectively. The relative error of the predicted freezing time versus real-time was -1.64%. Based on these results, the cooling processes for the thermal center of silver carp muscle with thicknesses of 24 mm and 34 mm were simulated, and the corresponding mean sums of squared differences between the simulated value and experimental data of the thermal center were 1.73 and 1.58, respectively. In conclusion, the model established using a combination of the prediction model of thermophysical parameters and numerical simulation showed high simulation accuracy for the freezing process of silver carp muscle with different thicknesses, providing a new simulation method for the freezing, processing, and quality control of freshwater fish and equipment design.
