Compound jet instability in a microchannel for mononuclear compound drop formation

A mononuclear compound droplet generation system has been developed based on both the hydrodynamic flow focusing and the solvent exchange method. The results show that the current system provided excellent control over the jet diameters of individual fluid consisting of the compound jet and the resultant compound drop diameters. The compound droplets were controlled in the range of 46–90 μm. The synchronous jet breakup for the mononuclear compound drop generation occurs where x 0.61 and x 0.76, respectively, for the inviscid and viscous capillary velocities. Also, the effect of the solvent diffusion during the jet breakup process and the shear stress on the compound droplet were investigated. (Some figures in this article are in colour only in the electronic version)