| 9 | Numerical investigation of the dynamics of a rigidspherical particle in a vortical cross-slot flow atmoderate inertia显示文摘The study of flow and particle dynamics in microfluidic cross-slot channels is of high relevance for lab-on-a-chipapplications. In this work, we investigate the dynamics of a rigid spherical particle in a cross-slot junction for a channelheight-to-width ratio of 0.6 and at a Reynolds number of 120 for which a steady vortex exists in the junction area.Using an in-house immersed-boundary-lattice-Boltzmann code, we analyse the effect of the entry position of theparticle in the junction and the particle size on the dynamics and trajectory shape of the particle. We find that thedynamics of the particle depend strongly on its lateral entry position in the junction and weakly on its vertical entryposition;particles that enter close to the centre show trajectory oscillations. Larger particles have longer residencetimes in the junction and tend to oscillate less due to their confinement. Our work contributes to the understanding ofparticle dynamics in intersecting flows and enables the design of optimised geometries for cytometry and particlemanipulation. | Konstantinos Kechagidis Benjamin Owen Lionel Guillou Henry Tse Dino Di Carlo Timm Krüger | 2023 | Microsystems & Nanoengineering2023，9，4： | 0 |
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