Patrick Tabeling and collaborators in the group of Alexander Leshansky (Technion-IIT, Israel) have just recently published a paper detailing droplet generation in microfluidic T-junctions.
Using experiments and numerics, they investigate the effect of the Capillary number and flow rate, microchannel geometry on the dynamics of droplet break-up.
For more information, access the paper here:
I. Chakraborty, J. Ricouvier, P. Yazghur, P. Tabeling, A. Leshansky. (2019). Physics of Fluids. 31(2), 022010.