Evaporation of surface liquid droplet in an air stream

TLDR: In this paper, the process of evaporation of a surface liquid drop in a uniform air stream has been studied and considered as being a diffusion plus momentum controlled phenomenon and the important parameters governing this phenomenon are the Stanton number, the drop Reynolds number, and the Schmidt number.

Abstract: The process of evaporation of a surface liquid drop in a uniform air stream has been studied and considered as being a diffusion plus momentum controlled phenomenon. The important parameters governing this phenomenon are the Stanton number, the drop Reynolds number, and the Schmidt number. Experiments have been conducted on the evaporation of water drops from a smooth plane surface in the presence and absence of a uniform air stream. The Reynolds numbers calculated from the equivalent initial dropdiameter varied from 4500 to 22000. Results of real size - time measurements indicate that the evaporation history is characterized by a decreasing pattern, but with an upward convex form. The overall evaporation time of a liquid drop in still air could be several time higher than that resulting when even a relatively low velocity air stream is employed.