Abstract: Internal flow field characteristics of air fryer are important for food processing. However, it is difficult to accurately measure and predict the distribution of the flowfield due to the complex internal structure of air fryer. Based on Reynolds time-mean equation and k-ε turbulence model, Fluent software was used to conduct three-dimensional numerical simulation of the flow field in an air fryer, and the detailed information of velocity, turbulent kinetic energy and vorticity distribution in the air fryer was obtained. The simulation results reveal the flow field movement law in the air fryer, the generation and development process of vortex structure, and the influence of the internal structure of the fryer on the flow field. The analysis results can guide the design of related structure and heating system of air fryer, and can also be used as a reference for the design and development of related small household appliances.

Key words: Air fryer, CFD, Performance prediction, Flowfield analysis