Numerical investigation of the dynamics of a rigid spherical particle in a vortical cross-slot flow at moderate inertia

Konstantinos Kechagidis, Benjamin Owen, Lionel Guillou, Henry Tse, Dino Di Carlo, Timm Krüger

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The study of flow and particle dynamics in microfluidic cross-slot channels is of high relevance for lab-on-a-chip applications. In this work we investigate the dynamics of a rigid spherical particle in a cross-slot junction for a channel height-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 the particle in the junction and the particle size on the dynamics and trajectory shape of the particle. We find that the dynamics of the particle depends strongly on its lateral entry position in the junction and weakly on its vertical entry position; particles that enter close to the centre show trajectory oscillations. Larger particles have longer residence times in the junction and tend to oscillate less due to their confinement. Our work contributes to the understanding of the particle dynamics in intersecting flows and enables the design of optimised geometries for cytometry and particle manipulation.
Original languageEnglish
Article number100
Number of pages16
JournalMicrosystems & Nanoengineering
Volume9
Issue number1
Early online date26 Jul 2023
DOIs
Publication statusPublished - Dec 2023

Fingerprint

Dive into the research topics of 'Numerical investigation of the dynamics of a rigid spherical particle in a vortical cross-slot flow at moderate inertia'. Together they form a unique fingerprint.

Cite this