describes the rate of diffusion of particles, depending on the particle size, viscosity and temperature
A factor of proportionality representing the amount of substance diffusing across a unit area through a unit concentration gradient in unit time.
A measure of the rate of movement of solutes or gases in response to a concentration gradient in the medium in which they are dissolved.
The diffusion coefficient is a numerical measure of the diffusion property that is constant for a specified system. Diffusion refers to the spreading out or dispersing of a material. Chemical diffusion is a passive process in which there is a net or greater movement of molecules or ions from a region of high concentration to a region of low concentration until equilibrium is reached.
The Langevin equation | The Smoluchowski equation | Mathematical definition of the centre of mass Normal mode analysis | Diffusion coefficient and viscosity
See diffusivity, coefficient of mutual diffusion.