The effect of geometrical confinement on coalescence efficiency of droplet pairs in shear flow

- Experimental investigation of the coalescence of two droplets in confined shear flow.
- Focus on effects of varying the initial offset in the velocity gradient direction.
- Due to confinement, coalescence is possible up to higher initial offsets.
- Confinement causes reversing droplet trajectories at low initial offsets.
- Confinement increases the coalescence efficiency compared to bulk conditions.