2025/06/09 by Piao, Linfeng, Juel, Anne
#FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Soft Condensed Matter (cond-mat.soft)
paper · doi:10.48550/arxiv.2506.07742
We present a scalable method for producing monodisperse micro-scale emulsions in a rectangular container holding two stably stratified layers of immiscible liquids by applying horizontal vibration. This setup enables the excitation of a single line of ordered Faraday waves along each end wall when viscous forces dominate interfacial dynamics. Our experiments and theoretical modelling show that the critical non-dimensional acceleration for the breakup of the wave tips in a regular array of droplets scales as N-1/2 ω*3/2, where N is the kinematic viscosity ratio and ω* is the frequency of forcing on the viscous-capillary scale. The droplet diameter can be easily tuned by varying the forcing parameters, and the number of droplets generated per cycle is proportional to the width of the container.