In this paper, we numerically investigate the breakup dynamics of droplets in an emulsion
flowing in a tapered microchannel with a narrow constriction. The mesoscale approach for
multicomponent fluids with near contact interactions is shown to capture the deformation and
breakup dynamics of droplets interacting within the constriction, in agreement with
experimental evidence. In addition, it permits us to investigate in detail the hydrodynamic
phenomena occurring during breakup stages. Finally, a suitable deformation parameter is …