## mean interstitial velocity of the carrier gas

in chromatography
https://doi.org/10.1351/goldbook.M03779
The @I03121@, $$u$$ of the @C00863@ multiplied by the @P04821@, $$j$$: $\bar{u} = u\ j$ $\bar{u} = \frac{F\ j}{\varepsilon_{\text{I}}}$ where $$F$$ is the @N04177@, $$\varepsilon_{\text{I}}$$ is the @I03120@.
Source:
Orange Book, 2nd ed., p. 103 [Terms]