This video demonstrates the Marangoni effect - fluid motion driven by surface tension gradients. When a drop of isopropanol mixed with dye is placed on sunflower oil, the alcohol locally reduces surface tension. Surrounding regions of higher surface tension pull the liquid away from the drop, creating rapid flows, instabilities, and branching patterns. Key point: The motion is not caused by mixing or diffusion, but by differences in surface tension at the interface between the liquids. This phen

The Marangoni effect (also called the Gibbs–Marangoni effect) is the mass transfer along an interface between two phases due to a gradient of the surface tension. In the case of temperature dependence, this phenomenon may be called thermo-capillary convection (or Bénard–Marangoni convection). Check us out for more science and daily facts.🤓 Video credit: Experiment 1024 (Youtube) | Science Is Fun For Everyone