Droplet formation and breakup dynamics in microfluidic flow-focusing devices: From dripping to jetting

▸ Micro-PIV technique was applied to quantify the flow field around a droplet. ▸ Droplet could be generated in either dripping or jetting regimes. ▸ The dynamics of droplet formation in both regimes was studied. ▸ The most unstable instability of the oil jet was analyzed.