Microscale Modeling of Frozen Particle Fluid Systems with a Bonded-Particle Model Method

Abstract

An inventive microscale simulation approach is applied to investigate the mechanics of frozen particle fluid systems (PFS). The simulation is based on the discrete element method (DEM) and bonded-particle model (BPM) approach. Discrete particles connected by solid bonds represent frozen agglomerates. Uniaxial compression experiments were performed to gather data for material modeling and further simulation model validation. Different typical mechanical behavior (brittle, ductile, dilatant) were reviewed regarding strain rates, saturation levels, and particle mechanical or surface properties. Among all these factors, strain rate significantly affects the mechanical behavior and properties of the agglomerates. A new solid bond model considering strain-dependent and time-dependent behavior is developed for describing the rheology of the frozen particle fluid systems. Without alternating Young’s modulus and Poisson’s ratio of the bond material, the developed solid model provides a suitable agreement with the experimental results regarding different strain rates.

Special Issue: “Computational Mechanics of Structures and Materials”

“…Chan et al investigated the mechanics of frozen particle fluid systems by means of a microscale simulation approach based on the discrete element method (DEM) and bonded-particle model (BPM) approach. The results provided by their methodology have been proven to be in good agreement with experimental results [11].…”

Feasibility Analysis of Calcium Carbonate Particle Trajectory Simulation in a Dual Horizontal Shaft Mixer

“…The discrete element method (DEM) is a numerical simulation method used to analyze the dynamics and mechanical properties of complex particle systems and has been widely used in the analysis of motion between particles and particles and between particles and machinery [7][8][9][10][11][12][13][14][15]. TING J et al [16] introduce in detail the development of discrete element two-dimensional elliptic particle numerical algorithms, and the changes between particles and particles and between particles, velocity, and force; "Equations that determine particle-to-particle, particle-to-wall contact position, and velocity increments are derived and integrated into traditional DEM algorithms."…”