Occurrence of vortices in electro-osmotic microchannel flows

G. Yossifon*, I. Frankel, T. Miloh

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


We study the electro-osmotic flow through a T-junction of micro-channels whose dielectric walls are weakly polarizable. The velocity field is obtained via superposition of an irrotational part associated with the equilibrium zeta potential and the induced-charge electroosmotic flow originating from the interaction of the externally-applied electric field and the charge cloud it induces owing to field leakage through the polarizable dielectric channel walls. Along the channel walls the latter component gives rise to fluid velocities converging toward the corner which dominate the flow in its immediate vicinity. Recent experimental observations in the literature regarding the appearance and subsequent expansion of flow reversal and vortices are rationalized in terms of the growing relative importance of this contribution to the global velocity field with increasing intensity of the externally applied electric field.

Original languageEnglish
StatePublished - 2007
Event47th Israel Annual Conference on Aerospace Sciences 2007 - Tel Aviv - Haifa, Israel
Duration: 21 Feb 200722 Feb 2007


Conference47th Israel Annual Conference on Aerospace Sciences 2007
CityTel Aviv - Haifa


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