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Electroosmotic Flow

Electroosmotic flow (EOF) arises from the migration of fluid due to an electric field, playing a significant role in driving separation in capillary electrophoresis.
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The statement of the theorem

Define the zeta potential ζ\zeta at the capillary wall and the applied electric field EE. The electroosmotic flow velocity veofv_{eof} is given by the Helmholtz-Smoluchowski equation, which simplifies to:\n\nveof=ϵζ Eηv_{eof} = \frac{\epsilon \zeta \ E}{\eta}
Source: Wikipedia