Drift and Diffusion Theory

Drift and Diffusion Theory describe how particles or molecules move in a fluid (liquid or gas). Drift refers to movement caused by an external force, like gravity or an electric field, which pushes particles in a specific direction. Diffusion, on the other hand, is the natural spreading of particles from areas of high concentration to low concentration, driven by random motion. Together, these processes explain how substances disperse in environments, such as pollutants spreading in air or nutrients moving in biological systems. The theory helps us understand and predict the behavior of particles in various scientific and engineering contexts.