Contact People:  D. Komitis  [jim.komitis@outlook.com],  K.  Noula      [Konstadinanul@gmail.com], K. Mpelova [klodimpelova@gmail.com]

The project is dedicated to the study of the boiling of emulsions. In general, emulsions are defined as systems of two immiscible liquids, where droplets of one phase (dispersed phase) are finely dispersed into the second (continuous phase). Boiling of emulsion is a relatively new, yet rapidly growing, scientific field, with the goal of understanding the mechanisms involved in the phenomenon, which will ultimately place emulsions in the field of heat transfer technology.

For the project, experiments involving pool and flow boiling of pentane droplets and pentane-to-water emulsions are conducted in order to draw conclusions about the phenomenon.

At this phase of the project, different modes of pentane droplet deposition and attachment to the hot boiling surface are tested. In addition, the effect of the hot surface temperature and supplied heat flux are examined. A serious effort is devoted to identify proper imaging and lighting conditions for accurate depiction of pentane droplet phase change while spread over the hot surface.

Video 1: Burst of n-Pentane droplet on top of a Heated Copper Surface

Video 2: Burst of n-Pentane Jet in Deionized water on top of a Heated Copper Surface

Video 3: Flow of n-Pentane Emulsion on top of a Heated Copper Surface

References

• Boiling Heat Transfer in Dilute Emulsions, Matthew Lind Roesle, Francis A. Kulacki, Publisher Springer New York, 23 May 2013