%0 Journal Article
%T Development of a saturation-based Mu(I)-rheology for wet granular materials using discrete element method
%J Scientia Iranica
%I Sharif University of Technology
%Z 1026-3098
%A Ghorbani, R.
%A T. Manzari, M.
%A Hajilouy-Benisi, A.
%D 2021
%\ 10/01/2021
%V 28
%N 5
%P 2719-2732
%! Development of a saturation-based Mu(I)-rheology for wet granular materials using discrete element method
%K Rheological model
%K DEM
%K Inertia number
%K Water saturation
%K Spherical grains
%R 10.24200/sci.2021.56993.5014
%X 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.
%U https://scientiairanica.sharif.edu/article_22208_20bde0120f9acd58c24e6f4e6abae599.pdf