Vogel-Fulcher-Tammann (VFT) equation

The Vogel-Fulcher-Tammann (VFT) equation describes how the viscosity or flow resistance of a material, like glass or supercooled liquids, increases rapidly as temperature decreases toward a certain point called the glass transition temperature. It models this behavior mathematically, showing that the closer the temperature gets to this point, the harder it becomes for the material to flow or deform. Essentially, the VFT equation helps us understand and predict how materials become more rigid and less fluid as they cool, which is important in fields like materials science and glass manufacturing.