The Many Personalities of Oil Mixed with Water February 11, 2021• Physics 14, s24 Turning an emulsion of oil droplets in water into one consisting of water droplets in oil drastically changes the fluid’s properties. Dennis van Gils/University of Twente Dennis van Gils/University of Twente × Oil and water don’t like to mix. But shake them hard enough, and they will form an emulsion with drops of one fluid suspended in the other. Compared to their individual constituent liquids, the flow properties of an emulsion are seemingly erratic, with the viscosity changing dramatically with...