Dimensions and units Diffusivity has dimensions of length 2 / time, or m 2 /s in SI units and cm 2 /s in CGS units.

Nov 20, 2025 · The characteristic property that determines this speed is called diffusivity—i.e., the ability of a molecule to diffuse through a sea of other molecules. Diffusivities in solids are extremely small, …

Diffusivity, including thermal diffusivity, mass diffusivity, momentum diffusivity and magnetic diffusivity, refers to the ability of particles and heat to diffuse spontaneously to make the system uniform and …

Jul 27, 2025 · Diffusivity, also known as the diffusion coefficient, quantifies the rate at which particles spread or mix within a medium. It represents the proportionality constant between the molar flux due …

Oct 14, 2025 · Mass diffusivity is the diffusion of particles through a medium, while thermal diffusivity is the diffusion of heat through a substance. Both are transport phenomena, but one involves mass …

Diffusivity is typically represented by the symbol 'D' and is measured in units of area per time, such as m²/s. Higher diffusivity values indicate that a substance can spread more quickly through another …

DIFFUSIVITY definition: the property of a substance indicative of the rate at which a thermal disturbance, as a rise in temperature, will be transmitted through the substance. See examples of …

Diffusivity is a measure of how easily particles move through a medium, like a liquid or solid. It tells us how quickly substances can spread out or mix with each other.

Diffusivity is the more fundamental concept and describes the stochastic process of heat spread throughout some local volume of a substance. Effusivity describes the corresponding transient …

Diffusivity is how easily a particular solute will move in a particular solvent for a particular gradient in concentration. The diffusivity of the methane decreases as the loading of the bigger, slower-moving …