With the gradual deepening of the study of seepage erosion in soil

the research methods of soil particle loss and deformation and failure mechanism show the characteristics of multi-scale. The computational fluid dynamics-discrete element coupling method (CFD-DEM) provides an effective method to study the macroscopic mechanical characteristics of soil on the microscale

considering the influence of fluid-solid interaction. Regarding the current application status of CFD-DEM coupling method in geotechnical engineering

this paper systematically summarizes the advantages and disadvantages of existing fluid-solid coupling calculation methods

focusing on the modeling strategies of CFD-DEM coupling method. These strategies include solid particle shape modeling and inter-particle contact models

control equations and parameter calculation methods for the fluid phase

as well as CFD-DEM coupling calculation. Furthermore

the paper conducts an in-depth exploration of related issues and concludes by proposing future development directions for the CFD-DEM coupling method.