Numerical investigation of channel blockage by flowing microparticles

摘要: Abstract The dynamic formation of 3D structures microparticle aggregates blocking the flow through straight microchannels is investigated by direct numerical simulation coupled motion particles and fluid. We use Force Coupling Method to handle simultaneously multibody hydrodynamic interactions confined flowing suspension together with particle–particle particle–wall surface leading adhesion aggregation particles. basic idea relies on a multipole expansion forcing terms (added Navier–Stokes equations) accounting for velocity perturbation induced presence in fluid flow. When particle reaches wall or an attached particle, we consider that irreversible this remains fixed. investigate kinetics microchannel blockage several solid volumetric concentrations different interaction forces. Many physical quantities such as temporal evolution bulk permeability, capture efficiency, modification forces acting are analyzed. show physical–chemical interactions, modeled DLVO forces, essential features which control dynamics aggregate structure.