Hydrodynamics of passing-over motion during binary droplet collision in shear flow

Wang Cheng-Yao¹, Zhang Cheng-Bin¹, Huang Xiang-Yong², Liu Xiang-Dong², Chen Yong-Ping^{1, 2, †,}

Effect of confinement on droplet rheological behaviors (Ca = 0.10, k = 1): (a) (i-a, i-b) local flow field (Co = 0.16, scale bar = 300 μm), (ii-a, ii-b) local flow field (Co = 0.20, scale bar = 300 μm), (iii) elongational component du_y/dy and shear rate du_x/dy for x fixed at the value where the highest elongational component of the velocity field are attained; (b) (i) local pressure field (Co = 0.16, scale bar = 300 μm), (ii) local pressure field (Co = 0.20, scale bar = 300 μm).