A constitutive model with microstructure evolution for flow of rate-independent granular materials

Jin Sun, Sankaran Sundaresan

Research output: Contribution to journalArticlepeer-review

Abstract

A constitutive model is developed for the complex rheology of rate-independent granular materials. The closures for the pressure and the macroscopic friction coefficient are linked to microstructure through evolution equations for coordination number and fabric. The material constants in the model are functions of particle-level properties and are calibrated using data generated through simulations of steady and unsteady simple shear using the discrete element method (DEM). This model is verified against DEM simulations at complex loading conditions.

Original languageEnglish
Pages (from-to)590-616
Number of pages27
JournalJournal of Fluid Mechanics
Volume682
Issue numbern/a
DOIs
Publication statusPublished - Sep 2011

Keywords

  • granular media
  • rheology
  • ANTIGRANULOCYTES-MATERIALS
  • DISSIPATIVE MATERIALS
  • PLANAR DEFORMATION
  • JAMMED MATTER
  • SHEAR FLOWS
  • STRESS
  • MEDIA
  • SLOW
  • SIMULATIONS
  • ASSEMBLIES

Cite this