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

A canned food, simulation analysis technology, applied in the field of simulation analysis of the thermal sterilization process of liquid canned food, can solve the problems of ignoring the influence of heat transfer in the headspace, not considering the phenomenon of liquid evaporation and condensation, and inaccurate calculation of the minimum sterilization value, etc. To achieve the effect of optimizing the sterilization process

Active Publication Date: 2019-07-16
ZHEJIANG UNIV
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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

Method used

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

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Embodiment Construction

[0024] The technical scheme adopted in the present invention is a simulation analysis method based on CFD technology to analyze the thermal sterilization process of liquid canned food, and the specific steps include:

[0025] a. Based on the liquid canned food to be analyzed and the thermal sterilization process to be analyzed, collect data, simplify the processing, and establish a canned heat transfer model; specifically:

[0026] The canned food to be analyzed is a 1.0% CMC solution that can be used to simulate the thermal sterilization process of liquid canned food. It is packed in canned food with can number 7113, and the density, dynamic viscosity, heat capacity at constant pressure, and thermal conductivity are obtained through measurement and parameter fitting. The coefficients as a function of temperature are shown in Table 1.

[0027] Table 1 Thermophysical parameter characteristics of 1.0% CMC solution

[0028]

[0029] The geometric dimensions of the can are: th...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50A23L3/00
CPCA23L3/00G06F30/20
Inventor 刘东红陈舒航刘懿周建伟叶兴乾
Owner ZHEJIANG UNIV
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