Abstract: The resuspension of radioactively contaminated soil particlesfollowing disturbance affects human health through inhalation and leads to the spread of pollution, thereby increasing the difficulty of prevention and control. However, existing research on the microscopic mechanisms of resuspension is insufficient to provide reliable parameters and model corrections for radiation impact assessments. This paper reviews the resuspension of radioactively contaminated soil particles, with an emphasis on the physical mechanisms involved in particle resuspension and the current research status of mainstream DEM-CFD coupling algorithms. The primary technical bottlenecks in existing studies include the high complexity of microscopic resuspension scenarios, insufficient accuracy in multi-scale coupling, low computational efficiency, and challenges in validation under real-world conditions, resulting in current models only capable of roughly estimating resuspension source terms in practical applications. Future research should focus on the development of complex microscopic models, high-performance optimization of multi-physics coupling, and quantitative validation in actual scenarios, thereby providing more reliable references for engineering applications.

Key words: radioactive contamination, particle resuspension, discrete element method, computational fluid dynamics