Applications of pairwise interaction extended point-particle model: mid-field spray control*

This study applies the pairwise interaction extended point-particle (PIEP) model to accurately predict the hydrodynamic influence between neighboring droplets dispersing in the externally controlled mid-field jet spray in an Euler-Lagrangian simulation. The two-way coupled Euler-Lagrangian methodology has been widely implemented in spray simulations, since it allows efficient tracking of millions of droplets without resolving the micro-scale flow around them. However, the accuracy of this approach suffers from the neglect of neighboring droplets interaction. In this talk we will first illustrate the importance of neighbor-neighbor interaction in the context of a sedimenting particle system. We will then consider simulations of mid-field evolution of a droplet spray with and without the PIEP model and evaluate the importance of accounting for droplet-droplet interaction. Finally we will consider the possibility of controlling the spray with acoustic forcing.