Issue 17, 2022

A numerical lift force analysis on the inertial migration of a deformable droplet in steady and oscillatory microchannel flows

Abstract

Inertial migration of deformable particles has become appealing in recent years due to its numerous applications in microfluidics and biomedicine. The physics underlying the motion of these particles is contingent upon the presence of lift forces in microchannels. Therefore, in this work, we present a lift force analysis for such migration of a deformable droplet in steady and oscillatory flow regimes and identify the effects of varying Capillary number and oscillation frequency on its dynamics. We then propose an expression that mimics the lift force behavior in oscillatory flows accurately. Finally, we introduce a procedure to derive and predict a simple expression for the steady and averaged oscillatory lift for any given combination of Capillary number and oscillation frequency within a continuous range.

Graphical abstract: A numerical lift force analysis on the inertial migration of a deformable droplet in steady and oscillatory microchannel flows

Article information

Article type
Paper
Submitted
17 Feb 2022
Accepted
15 Jul 2022
First published
21 Jul 2022

Lab Chip, 2022,22, 3245-3257

Author version available

A numerical lift force analysis on the inertial migration of a deformable droplet in steady and oscillatory microchannel flows

A. Lafzi and S. Dabiri, Lab Chip, 2022, 22, 3245 DOI: 10.1039/D2LC00151A

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