The lead-bismuth eutectic (LBE) alloy, owing to its pronounced corrosive properties, generates a series of corrosion particles upon prolonged contact with material surfaces. The migration and deposition of these particles within the medium can potentially result in clogging, thereby directly compromising the reactor's safety and reducing its operational lifespan.

This study aims to investigate the deposition velocity characteristics of particles within LBE media and the factors that influence them.

A solution model for determining particle deposition velocity within the boundary layer of horizontal pipes was formulated, drawing upon the particle transport equation within the Eulerian framework. After establishing the boundary conditions for the given model, it was discretized and solved utilizing MATLAB software. Subsequently, the model was validated through comparison with experimental data obtained from air media and was further adapted for application in LBE media.

The comparison results reveal that the particle deposition rate in LBE media exhibits an "S"-shaped pattern as a function of particle diameter. Notably, wall roughness exerts a significant influence on the deposition rate of smaller particles, whereas fluid velocity has a more pronounced effect on the deposition rate of larger particles. Additionally, the impacts of particle type and fluid temperature on particle deposition rate are relatively minor.

These findings of this study provide important theoretical support for understanding the particle deposition behavior in LBE media and have significant implications for optimizing reactor design and enhancing safety.