# Reverse diffusion

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{{One source|date=August 2025}}

'''Reverse diffusion''' refers to a situation where the transport of particles ([atom](/source/atom)s or [molecule](/source/molecule)s) in a medium occurs towards regions of higher concentration gradients, opposite to that observed during [diffusion](/source/diffusion). This phenomenon occurs during [phase](/source/phase_(matter)) separation and is described by the [Cahn–Hilliard equation](/source/Cahn%E2%80%93Hilliard_equation).<ref>{{Cite journal|last1=Cahn|first1=John W.|last2=Hilliard|first2=John E.|date=February 1958|title=Free Energy of a Nonuniform System. I. Interfacial Free Energy|url=http://aip.scitation.org/doi/10.1063/1.1744102|journal=The Journal of Chemical Physics|language=en|volume=28|issue=2|pages=258–267|doi=10.1063/1.1744102|bibcode=1958JChPh..28..258C |issn=0021-9606|url-access=subscription}}</ref> '''Reverse diffusion''' also refers to when water is forced from a region of lower concentration to high. It can occur in [osmosis](/source/osmosis).

==See also==

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==References==
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{{DEFAULTSORT:Reverse Diffusion}}
Category:Diffusion

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[cs:Reverzní osmóza](/source/cs%3AReverzn%C3%AD_osm%C3%B3za)

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