Encyclopedia of Microfluidics and Nanofluidics

Living Edition
| Editors: Dongqing Li

Electroosmotic Instability

Living reference work entry
First Online:
Received:
Accepted:
DOI: https://doi.org/10.1007/978-3-642-27758-0_421-6
How to cite

Synonyms

Electroosmosis of the second kind; Nonequilibrium electroosmosis

Definition

Electroosmotic instability (EOI) is a particular type of electroconvective (electrohydrodynamic) instability of quiescent electric 1D conduction from a strong electrolyte into a charge selective solid, such as electrode, ion-exchange membrane, nano-slot, or an array of nano-pores. Passage of electric current in this set up induces concentration polarization (CP) – formation of electrolyte concentration (conductivity) gradient colinear to the electric current (electric field), with the electrolyte concentration decreasing towards the charge selective interface. Upon the decrease of the interface concentration, the electric double layer (EDL) at the interface transforms from its common quasi-equilibrium structure to a different, nonequilibrium one. The key feature of this new structure is the extended space charge (ESC) developing next to the outer (solution) edge of the common quasi-equilibrium EDL. The...

This is a preview of subscription content, log in to check access.

References

  1. 1.
    Saville DA (1997) Electrohydrodynamics: the Taylor-Melcher leaky dielectric model. Annu Rev Fluid Mech 29:27–64CrossRefMathSciNetGoogle Scholar
  2. 2.
    Storey B, Rubinstein I, Zaltzman B (2007) Bulk electroconvective instability at high Péclet numbers. Phys Rev E 76:041501CrossRefGoogle Scholar
  3. 3.
    Chen H, Lin H, Lele SK, Santiago JG (2005) Convective and absolute electrokinetic instability with conductivity gradients. J Fluid Mech 524:263–303CrossRefMATHGoogle Scholar
  4. 4.
    Zholkovskij EK, Vorotyntsev MA, Staude E (1996) Electrokinetic instability of solution in a plane-parallel electrochemical cell. Adv Colloid Interf Sci 181:28–33CrossRefGoogle Scholar
  5. 5.
    Rubinstein I, Shtilman L (1979) Voltage against current curves of cation exchange membranes. J Chem Soc Faraday Trans II 75:231–246CrossRefGoogle Scholar
  6. 6.
    Dukhin SS (1991) Electrokinetic phenomena of the second kind and their applications. Adv Colloid Interf Sci 35:173–196CrossRefGoogle Scholar
  7. 7.
    Rubinstein I, Zaltzman B (2000) Electro-osmotically induced convection at a permselective membrane. Phys Rev E 62:2238–2251CrossRefMathSciNetGoogle Scholar
  8. 8.
    Zaltzman B, Rubinstein I (2007) Electro-osmotic slip and electroconvective instability. J Fluid Mech 579:173–226CrossRefMATHMathSciNetGoogle Scholar
  9. 9.
    Chang HC, Yossifon G, Demekhin EA (2012) Nanoscale electrokinetics and microvortices: how microhydrodynamics affects nanofluidic ion flux. Annu Rev Fluid Mech 44:401–426CrossRefMathSciNetGoogle Scholar
  10. 10.
    Kwak R, Pham VS, Lim KM, Han J (2013) Shear flow of an electrically charged fluid by ion concentration polarization: scaling laws for electroconvective vortices. Phys Rev Lett 110:114501CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevMidreshetIsrael