Evaluating cohesive models in discrete element simulation through drawdown test with new assessment perspectives
Year: 2024
Type: article
Abstract: This study explores the time-dependent and micro-to-macro behaviours of cohesive wet granules through discrete element simulation of a widely employed calibration procedure, i.e., drawdown test. Two distinct cohesive models, i.e., the Easo Liquid-Bridge (ELB) and simplified JKR (SJKR) are adopted. Their simulation results are not only validated with past experimental observations, but also compared with each other in multiple aspects. The results show substantial difference in time-dependent deformation and mass-volume change correlations characterised by the ELB and SJKR models, though they both show good agreement in bulk parameters with the experiment at final stage of drawdown test. Moreover, this study points out critical deviations in microscale features such as the contact network and porous structure that determines the macroscale responses under different concepts of cohesive contact. The results suggest new assessment parameters for modelling cohesive material and provide a deeper insight into the micro-to-macro understanding.
Source: Powder Technology
Institution: University of Technology Sydney
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,360
OpenAlex ID: W4405365612