Browse > Article
http://dx.doi.org/10.9713/kcer.2020.58.2.319

Time-resolved Analysis for Electroconvective Instability under Potentiostatic Mode  

Lee, Hyomin (Department of Chemical and Biological Engineering, Jeju National University)
Publication Information
Korean Chemical Engineering Research / v.58, no.2, 2020 , pp. 319-324 More about this Journal
Abstract
Electroconvective instability is a non-linear transport phenomenon which can be found in ion-selective transport system such as electrodialysis, Galvanic cell and electrolytic cell. The instability is triggered by the fluctuation of space charge layer in adjacent of ion-selective surface, leading to increase of mass transport rate. Thus, in the aspect of mass transport, the instability has an important meaning. Although recent experimental techniques have opened up an avenue to direct visualize the instability, fundamental investigations have been conducted in limited area due to several experimental limitations. In this work, the electroconvective instability under potentiostatic mode was solved by numerical method in order to demonstrate correlation between current-time curve and the instability behavior. By rigorous time-resolved analysis, the transition behaviors can be divided into three stages; formation of space charge layer - growth of electroconvective instability - steady state. Furthermore, scaling laws of transition time were numerically obtained according to applied voltage as well.
Keywords
Electroconvective instability; Ion-selective transport; Potentiostatic mode; Time-resolved analysis; Transition time;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Rubinstein, I. and Zaltzman, B., "Electro-osmotic Slip of The Second Kind and Instability in Concentration Polarization at Electrodialysis Membranes," Math. Models Methods Appl. Sci., 11(02), 263-300(2001).   DOI
2 Kim, S. J., Wang, Y.-C., Lee, J. H., Jang, H. and Han, J., "Concentration Polarization and Nonlinear Electrokinetic Flow near a Nanofluidic Channel," Phys. Rev. Lett., 99(4), 044501(2007).   DOI
3 Rubinstein, S. M., Manukyan, G., Staicu, A., Rubinstein, I., Zaltzman, B., Lammertink, R. G. H., Mugele, F. and Wessling, M., "Direct Observation of a Nonequilibrium Electro-Osmotic Instability," Phys. Rev. Lett., 101(23), 236101(2008).   DOI
4 Yossifon, G. and Chang, H.-C., "Selection of Nonequilibrium Overlimiting Currents: Universal Depletion Layer Formation Dynamics and Vortex Instability," Phys. Rev. Lett., 101(25), 254501(2008).   DOI
5 Kim, S. J., Ko, S. H., Kwak, R., Posner, J. D., Kang, K. H. and Han, J., "Multi-vortical Flow Inducing Electrokinetic Instability in ion Concentration Polarization Layer," Nanoscale, 4(23), 7406-7410(2012).   DOI
6 Green, Y. and Yossifon, G., "Dynamical Trapping of Colloids at the Stagnation Points of Electro-osmotic Vortices of the Second Kind," Phys. Rev. E, 87(3), 033005(2013).   DOI
7 Kim, S. J., Li, L. D. and Han, J., "Amplified Electrokinetic Response by Concentration Polarization near Nanofluidic Channel," Langmuir, 25(13), 7759-7765(2009).   DOI
8 Druzgalski, C. L., Andersen, M. B. and Mani, A., "Direct Numerical Simulation of Electroconvective Instability and Hydrodynamic Chaos Near an Ion-selective Surface," Phys. Fluids, 25(11), 110804(2013).   DOI
9 Demekhin, E. A., Nikitin, N. V. and Shelistov, V. S., "Direct Numerical Simulation of Electrokinetic Instability and Transition to Chaotic Motion," Phys. Fluids, 25(12), 122001(2013).   DOI
10 Lee, H., "Electroconvective Instability on Undulated Ion-selective Surface," Korean Chem. Eng. Res., 57(5), 735-742(2019).   DOI
11 Karatay, E., Druzgalski, C. L. and Mani, A., "Simulation of Chaotic Electrokinetic Transport: Performance of Commercial Software Versus Custom-built Direct Numerical Simulation Codes," J. Colloid Interface Sci., 446, 67-76(2015).   DOI
12 Pham, V. S., Li, Z., Lim, K. M., White, J. K. and Han, J., "Direct Numerical Simulation of Electroconvective Instability and Hysteretic Current-voltage Response of a Permselective Membrane," Phys. Rev. E, 86(4), 046310(2012).   DOI
13 Kwak, R., Pham, V. S., Lim, K. M. and Han, J., "Shear Flow of an Electrically Charged Fluid by Ion Concentration Polarization: Scaling Laws for Electroconvective Vortices," Phys. Rev. Lett., 110(11), 114501(2013).   DOI
14 Rubinstein, I. and Zaltzman, B., "Electro-Osmotically Induced Convection at a Permselective Membrane," Phys. Rev. E, 62(2), 2238-2251(2000).   DOI