# Diffusivity

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Diffusivity
> Markdown URL: https://mediated.wiki/source/Diffusivity.md
> Source: https://en.wikipedia.org/wiki/Diffusivity
> Source revision: 1240916566
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{SIA-Conversion-Expand}}
'''Diffusivity''' is a rate of [diffusion](/source/diffusion), a measure of the rate at which particles or heat or fluids can spread.

It is measured differently for different mediums.

Diffusivity may refer to:
*[Thermal diffusivity](/source/Thermal_diffusivity), diffusivity of heat
*Diffusivity of mass:
** [Mass diffusivity](/source/Mass_diffusivity), molecular diffusivity (often called "diffusion coefficient")
** [Eddy diffusion](/source/Eddy_diffusion), eddy diffusivity
*[Kinematic viscosity](/source/Viscosity), characterising momentum diffusivity
*[Magnetic diffusivity](/source/Magnetic_diffusivity)

==Dimensions and units==

Diffusivity has dimensions of length<sup>2</sup> / time, or m<sup>2</sup>/s in [SI units](/source/SI_units) and cm<sup>2</sup>/s in [CGS units](/source/CGS_units).

== See also ==
* [Diffusibility](/source/Diffusibility)

==References==
{{reflist}}

Category:Former disambiguation pages converted to set index articles<!--- admin note: pls keep even if page becomes disambiguation again--->

{{SIA}}

---
Adapted from the Wikipedia article [Diffusivity](https://en.wikipedia.org/wiki/Diffusivity) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Diffusivity?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.