(518g) Breakup of a Drop Under a Stagnation Point Flow

Recent studies by Hooshanginejad and Lee (2017) have demonstrated complex depinning behaviors of a partially wetting droplet under wind. Motivated by this study, we examine the coupled evolution of a 2D thin drop and external wind, when it is initially held against a fast stagnation point flow. Our drop lubrication model employs the potential flow and Prandtl boundary layer theory for outer flow to compute the internal drop flow corresponding to drop deformations. Both the analytical and numerical steady state solutions provide a partial prediction for the drop’s final shape and help identify the range of droplet sizes that undergo a breakup for the given flow condition. Furthermore, we show that the 2D model is qualitatively in good agreement with the experiments.