These include continuous random walk descriptions of the turbulent fluctuations along the bubble path and DNS descriptions to provide a fully resolved field. The objective is to properly predict the uniformity of the liquid water content produced by spray bars in the NASA Lewis Icing Research Tunnel used to simulate clouds for icing tests. A computational fluid dynamics methodology is being developed that treats the droplets in Lagrangian form and the tunnel aerodynamics in Eulerian form. Recent research has allowed a novel CPU acceleration. In addition, nonlinear turbulent diffusion models are included to account for the jets and wake used to distribute the droplets.
Virtual reality is investigated to image the complex field.