431348 The Fluidization and Adsorption of Soft Particles Studied with Hybrid Element Method and Fluid Dynamics

Tuesday, November 10, 2015: 4:12 PM
254A (Salt Palace Convention Center)
Mohammadreza Samieegohar1, Tao Wei1, Ian Lian2 and Liangbiao Chen3, (1)Dan F. Smith Department of Chemical Engineering, Lamar University, Beaumont, TX, (2)Biology Department, Lamar University, Beaumont, TX, (3)Mechanical Engineering, Lamar University, Beaumont, TX

The properties and behaviors of flowing particles are essential to the characteristics of associated micro- and macro-fluid mechanics applicable to biological and MEMs systems. In this work, we employed hybrid discrete element method and computational fluid dynamics (DEM-CFD) to study the soft particles’ fluidization and adsorption. The soft-core potential is introduced to calculate the contact forces of particle-particle and particle-wall. The non-contact force is calculated with Derjaguin-Landau-Verway-Overbeek (DLVO) theory. The dielectrophoretic force (DEF) and drag force are included for the effect of the fluid on particles. Particle dynamic motions (aggregation in the bulk and adsorption/desorption/exchange adjacent to the wall) are analyzed as a function of the wall boundary confinement and the particles’ size, density and rigidity.

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