Interface evolution and pinch-off mechanism of droplet in two-phase liquid flow through T-junction microfluidic system

This work has explored interface evolution and pinch-off mechanism of the droplet formation in two-phase flow through cross-flow microfluidic device. The two-dimensional mathematical model equations have been solved using finite element method under squeezing regime (Cac< 10?2) for wide range rates (0.1 ? Qr 10) fixed contact angle (? = 135°). process classified into various instantaneous stages as initial, filling, squeezing, stable microscopic visualization phase profiles. dynamics interface, point pressure both phases is further gained discussed. Maximum continuous varied linearly with Qr. thoroughly elucidated by determining local radius curvature (Rc,min) neck width (2r) during stages. At point, Rc,min 2r are non-linearly related to Further, topological analyzing Laplace (pL), acting on curvature, evaluated (a) sensors phases, pL pdp ? pcp, (b) pL=?1?Rf+1?Rr, (c) minimum pL=?1?Rc,min. insights obtained from present can reliably be used designing prototypes devices generating monodispersed droplets emulsions, breakup would help accurate prediction moment. proposed knowledge provides detailed a precision 10 ?s resolution ?m, equivalent experimental high-speed (105 fps) high-resolution (10 ?m pixel size) camera.