Non-Local Rheology Implementation for Granular Flow Modeling

CÉSAR VENIER; SANTIAGO MARQUEZ DAMIAN; NORBERTO NIGRO

Bahía Blanca

Congreso; XXXVIII Congreso sobre Métodos Numéricos y sus Aplicaciones; 2022

This work presents the implementation of a granular rheology model based on the non-localgranular flow (NGF) model. This is done on the structure of the Volume-Of-Fluid (VOF) model formultiphase flows. These developments are motivated by the need for a low computational cost methodfor modeling granular media in dense phase, which are found in multiple applications in the industrialfield. In particular, there are phenomena where the shear stresses depend on the size of the particle (e.g.Couette flow, silo discharge), as well as cases where the movement (or absence thereof) of the mass ofgrains is not strictly bounded above or below the yield limit (e.g. clogging in silo discharge, grain flowon an inclined plane). For these cases, the continuum models of local granular rheology, usually used,are limited. The implementation of this model is tested in a series of benchmark cases and the results arecontrasted with experimental observations or analytical solutions. The simulation results show a goodagreement with those reported in the literature, highlighting the benefits of these models and laying thefoundations for their application in cases of industrial scale.