'''Diffusion''' is a [[time]]-dependent [[process]], constituted by [[random]] [[motion]] of given [[entities]] and [[causing]] the [[statistical]] [[distribution]] of these entities to spread in [[space]]. The [[concept]] of diffusion is tied to notion of [http://en.wikipedia.org/wiki/Mass_transfer mass transfer], driven by a concentration gradient. | '''Diffusion''' is a [[time]]-dependent [[process]], constituted by [[random]] [[motion]] of given [[entities]] and [[causing]] the [[statistical]] [[distribution]] of these entities to spread in [[space]]. The [[concept]] of diffusion is tied to notion of [http://en.wikipedia.org/wiki/Mass_transfer mass transfer], driven by a concentration gradient. |