Lateral Migration of Three Particles Through a Slit—An Immersed Boundary Computational Analysis

Abstract

The current work focuses on the migration of three particles in Poiseuille flow through a slit microchannel. The immersed boundary finite volume methodology based on feedback forcing scheme is used to build the computational model for the analysis of particle migration through slit. Three rigid non-neutrally buoyant cylindrical particles are released from same lateral position in a channel of 20 × 1 dimension. It is observed that the particles travel through the slit and attain equilibrium position at the center of the channel. Further, the influence of slit gap and angle on the equilibrium position and residence time is studied. It is interesting to see that the equilibrium position stays unaffected by the changes in both of the above mentioned parameters. However, the residence time increases with the slit gap. It should be also noted that the migration time is the lowest for a slit angle of π/2. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.