Non-Local Rheology Implementation for Granular Flow Modeling

VENIER CESAR; MARQUEZ DAMIAN, SANTIAGO; NIGRO NORBERTO

Bahia Blanca

Congreso; MECOM 2022; 2022

AMCA

This work presents the implementation of a granular rheology model based on thenon-local granular flow (NGF) model. This is done on the structure of the Volume-Of-Fluid(VOF) model for multiphase flows. These developments are motivated by the need for a lowcomputational cost method for modeling granular media in dense phase, which are found inmultiple applications in the industrial field. In particular, there are phenomena where the shearstresses depend on the size of the particle (e.g. Couette flow, silo discharge), as well as caseswhere the movement (or absence thereof) of the mass of grains is not strictly bounded aboveor below the yield limit (e.g. clogging in silo discharge, grain flow on an inclined plane). Forthese cases, the continuum models of local granular rheology, usually used, are limited. Theimplementation of this model is tested in a series of benchmark cases and the results are con-trasted with experimental observations or analytical solutions. The simulation results show agood agreement with those reported in the literature, highlighting the benefits of these modelsand laying the foundations for their application in cases of industrial scale.