A numerical lift force analysis on the inertial migration of a deformable droplet in steady and oscillatory microchannel flows. Issue 17 (28th July 2022)

• Record Type: Journal Article
• Authors: Lafzi, Ali; Dabiri, Sadegh
• Is Part Of: Lab on a chip. Volume 22:Issue 17(2022)
• Page Start: 3245
• Page End: 3257
• Publication Date: 2022-07-28
• Subjects: Miniature electronic equipment -- Periodicals; Combinatorial chemistry -- Periodicals; Biotechnology -- Periodicals; 543.0813
• DOI: 10.1039/d2lc00151a
• Languages: English
• ISSNs: 1473-0197

Abstract

Abstract : We report a new approach to analyze lift forces acting on a droplet in steady and oscillatory microchannel flows. We use nonlinear regression and Bayesian modeling to derive the lift profiles for various oscillation frequencies and Capillary numbers. 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.