Direct numerical simulation of electroconvective instability and hysteretic current-voltage response of a permselective membrane
Name
Pham-2012-Direct numerical simulation of electroconvective instability.pdf
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2.34 MB
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Adobe PDF
Checksum (MD5)
07d9b1700d63a00af0359deebdb8a381
Author(s)
Li, Zirui
Lim, Kian Meng
White, Jacob K.
Han, Jongyoon
Pham, Van-Sang
Date Issued
October 2012
Journal
Physical Review E
Publisher
American Physical Society
Citation
Pham, Van et al. “Direct Numerical Simulation of Electroconvective Instability and Hysteretic Current-voltage Response of a Permselective Membrane.” Physical Review E 86.4 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We present a systematic, multiscale, fully detailed numerical modeling for dynamics of fluid flow and ion transport covering Ohmic, limiting, and overlimiting current regimes in conductance of ion-selective membrane. By numerically solving the Poisson-Nernst-Planck-Navier-Stokes equations, it is demonstrated that the electroconvective instability, arising from the electric field acting upon the extended space charge layer, and the induced strong vortical fluid flow are the dominant factors of the overlimiting current in the planar membrane system. More importantly, at the transition between the limiting and the overlimiting current regimes, hysteresis of electric current is identified. The hysteresis demonstrates the important role of the electroconvective flow in enhancing of current in electrolyte systems with ion-selective membrane.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Singapore-MIT Alliance in Research and Technology (SMART)
Singapore-MIT Alliance in Research and Technology (SMART)
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevE.86.046310
