Numerical Simulation of Shear-Induced Particle Migration of Concentrated Suspension in a Networked-Bifurcating Channels
摘要
Suspensions are made with solid rigid particles in viscous fluids often used in many industries as well as biological processes and natural phenomena. In some phenomena, separating the particles from the bulk suspension is critical. Suspension flow even in simple geometry has complex nature. In the current work, numerical investigation of the shear-induced particle migration of concentrated suspension in a network of bifurcating channels is performed. A numerical simulation of monodisperse suspension in a two-dimensional (2D) network of bifurcating channels was performed. The velocity profile of suspension has a marked difference from the velocity profile of the pure fluid having same effective viscosity. Moreover, the concentration field shows inhomogeneous particle distribution resulting from shear-induced migration. There is unequal partitioning of particles in the daughter branches, and the partitioning of particles does not follow the partitioning of the bulk suspension.