Spatially Resolved Evaporative Patterns from Water
  Unexpectedly distinct patterns in evaporation were observed over heated water. Although the patterns had chaotic aspects, they often showed geometric patterns. These patterns bore strong resemblance to the infrared emission patterns observable with a mid-infrared camera focused on the water surface. This similarity puts constraints on the mechanism of evaporation, and leads to a general hypothesis as to the nature of the evaporative process. 
Federico Ienna, Hyok Yoo, and Gerald H. Pollack
physics.flu-dyn cond-mat.soft