Eulerian cross-phase diffusive effects on impinging droplets and phase change heat transfer

This article investigates interfacial diffusion in relative motion between the dispersed (droplet) phase and the carrier (air) phase of multiphase flows. New Eulerian modeling of these cross-phase interactions is developed for a Control Volume Based Finite Element Method (CVFEM). These interfacial terms have important effects on heat transfer and deflected droplets near a surface. Past studies have outlined their significance on reduced collection efficiencies of iced surfaces. But this article adds new insight regarding their effects on phase change heat transfer at the surface. The multiphase heat balance at a glaze ice surface outlines the role of collection efficiency on the freezing fraction of incoming droplets, temperature gradients and thickness of the flowing supercooled surface film.