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SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: Asme International Mechanical Engineering Congress And Exposition, Proceedings (imece) Título del capítulo: VISCOELECTRIC EFFECT ON THE ELECTROOSMOTIC FLOW IN NANOCHANNELS WITH HETEROGENEOUS ZETA POTENTIALS
In the present work, we realize a study about the influence of
viscoelectric effect on the electroosmotic flow of Newtonian fluids in
nanochannels formed by two parallel flat plates. In the problem, the
channel walls have heterogeneous zeta potentials which follow a
sinusoidal distribution; moreover, viscoelectric effects appear into the
electric double layers when high zeta potentials are considered at the
channel walls, modifying the fluid viscosity and the fluid velocity. To
find the solution of flow field, the modified Poisson-Boltzmann, mass
conservation and momentum governing equations, are solved numerically.
In the results, combined effects from the zeta potential heterogeneities
and viscosity changes yields different kind of flow recirculations
controlled by the dephasing angle, amplitude and number of waves of the
heterogeneities at the walls. The viscoelectric effect produces a
decrease in the magnitude of velocity profiles and volumetric flow rate
when the high zeta potentials are magnified. Additionally, the
heterogeneous zeta potentials at the walls generate an induced pressure
on the flow. This investigation extend the knowledge of electroosmotic
flows under field effects for future mixing applications.
Entidades citadas de la UNAM:
Fuente:
ISBN: 9780791852156 Editorial: American Society of Mechanical Engineers (ASME)
