Does drop size affect the mechanism of viscoelastic drop breakup?

We studied the breakup of viscoelastic drops in Newtonian liquid matrices undergoing simple shear flow. The coexistence of different breakup modes was observed. The drop size determines, to a great extent, the type of drop breakup mechanism and the critical point when the mechanism changes. Small drops break along the vorticity direction, which is the direction perpendicular to the flow direction and the velocity gradient direction, whereas large drops break in the flow direction. The change in mechanism abruptly occurs as the drop size reduces. There is a big jump in the critical shear rate when the mechanism changes from breakup in the flow direction to breakup in the vorticity direction.