Diffusion is a physical process that describes the movement of particles from an area of higher concentration to an area of lower concentration. This movement occurs due to the random thermal motion of particles and continues until equilibrium is reached, meaning that the concentration of particles is uniform throughout a given space. Diffusion can occur in various states of matter, including gases, liquids, and solids.
Articles by others on the same topic
Diffusion is the spreading of heat or material by microscopic random motion. A concentration gradient produces flux down that gradient; with uniform diffusion coefficient , conservation gives the diffusion equation . In a moving carrier, advection must also be included. Physical diffusion is a transport mechanism, distinct from the general probabilistic class of Markov diffusion.
