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
FEDERICO MENDEZ LAVIELLE;
Autores externos:
Idioma:
Inglés
Año de publicación:
2018
Palabras clave:
Nanosystems; Newtonian liquids; Viscosity; Zeta potential; Electric double layer; Electroosmotic flow; Governing equations; Mass conservation; Parallel flat plates; Sinusoidal distribution; Velocity profiles; Volumetric flow rate; Electroosmosis
Resumen:
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. © 2018 ASME.
Entidades citadas de la UNAM:
ISBN:
9780791852156
Editorial:
American Society of Mechanical Engineers (ASME)
