Evolution of Water-in-Oil Droplets in T-Junction Microchannel by Micro-PIV

Water-in-oil droplets have huge importance in chemical and biotechnology applications, despite their difficulty being produced microfluidics. Moreover, existing studies focus more on the different shape of microchannels instead size, which is one critical factors that can influence flow characteristics droplets. Therefore, present work aims to study behaviours water-in-oil at interfacial surface an offset T-junction microchannel, having radiuses, using micro-PIV software. Food-grade palm olein distilled water seeded with polystyrene microspheres particles were used as working fluids, captured images showing generated droplets’ focused junction respective microfluidic channel, i.e., radiuses 400 µm, 500 750 µm 1000 analysed via PIVlab. The increasing radius microchannel leads increase cross-sectional area decrease phase’s velocity. experimental velocity droplet agreement theoretical values, a minimal difference low 0.004 mm/s for case µm. In summary, small channel’s size yields significant overall liquid.