@article { author = {Ghorbani, R. and T. Manzari, M. and Hajilouy-Benisi, A.}, title = {Development of a saturation-based Mu(I)-rheology for wet granular materials using discrete element method}, journal = {Scientia Iranica}, volume = {28}, number = {5}, pages = {2719-2732}, year = {2021}, publisher = {Sharif University of Technology}, issn = {1026-3098}, eissn = {2345-3605}, doi = {10.24200/sci.2021.56993.5014}, abstract = {The discrete element method (DEM) is used to establish a rheological model that relates the apparent viscosity of a granular material to shear rate, normal stress, and water saturation. A theoretical model is developed to determine water distribution and water-induced forces between particles for different saturations. The resulting forces are embedded in a 3D shear cell as a numerical rheometer and a wet specimen is sheared between two walls. A power law rheological model is obtained as a function of inertia number and saturation. It was found that up to a critical saturation, the apparent viscosity increases with saturation and is higher than that of the dry specimen. However, when the saturation exceeds a critical value, the viscosity suddenly drops below that of dry condition. To evaluate the model, the collapse of two-dimensional granular material on a horizontal rigid bed is studied using continuum-based numerical simulation which utilizes the proposed rheological model.}, keywords = {Rheological model,DEM,Inertia number,Water saturation,Spherical grains}, url = {https://scientiairanica.sharif.edu/article_22208.html}, eprint = {https://scientiairanica.sharif.edu/article_22208_20bde0120f9acd58c24e6f4e6abae599.pdf} }