CFD-based simulation analysis method for thermal sterilization process of liquid canned food

Abstract

The invention discloses a CFD-based simulation analysis method for a thermal sterilization process of a liquid canned food, and the method comprises the steps: collecting data, carrying out the simplification processing, and building a can heat transfer model; based on the model, determining a control equation, an initial condition, a boundary condition and a subdivision grid, importing the control equation, the initial condition, the boundary condition and the subdivision grid into COMSOL Multiphysics software, and carrying out CFD solution; and performing corresponding post-processing basedon the result of the CFD solution, and analyzing the thermal sterilization process. According to the invention, the change conditions of physical quantities such as fluid flowing speed, temperature, pressure, humidity and the like at any position at any time in the liquid canned food in the thermal sterilization process to be studied can be given, and the physical field change and the thermal sterilization effect in the thermal sterilization process can be analyzed more accurately. The method is suitable for liquid canned food with different tank shapes and different contents, is helpful for accurately finding the position of a cold point before a hot penetration test is carried out, determines the shortest sterilization time, and finally realizes the optimization of the sterilization process.

Description

technical field [0001] The invention relates to the field of food processing, in particular to a CFD-based simulation analysis method for the thermal sterilization process of liquid canned food Background technique [0002] Canned food is widely used in the food industry because of its good sealing and sterilization measures. Thermal sterilization is the most commonly used sterilization method in food processing because of its effectiveness and convenience. CFD (Computational Fluid Dynamics) is to use the governing equations to numerically simulate fluid flow, and obtain the distribution of physical quantities at various positions in the flow field and the changes of these physical quantities with time by solving the equations. [0003] Thermal sterilization of liquid canned food usually involves fluid heat transfer. It is difficult to obtain the temperature distribution of each position in the can at any time by traditional methods, and the accuracy of judging the cold poi...

AI Technical Summary

Problems solved by technology

[0005] At present, there are few examples of using CFD method to analyze the thermal sterilization process of canned food, and most of them ignore the influence of the headspace on heat transfer, or do not consider the evaporation and condensation of the liquid in the headspace, so the pressure in the sterilization process cannot be calculated. accurate consideration of changes

Neglecting headspace also biases temperature predictions and leads to inaccurate calculations of minimum kill values

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