Knudsen diffusion

Knudsen diffusion is when the diffusivity is determined by the size of the containing vessel instead of the solvents or solutes. It is generally applicable in a combination of small vessel sizes or very low pressures. What happens is that the free path of a molecule is not limited by the nearby molecules (the solvent) but by the walls of its container.

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See also

• Knudsen number
• Diffusion

External link: Transport in Small Pores [1]