A study of electroconvection during uniform electrolyte solution flow through an ion-selective area

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The results of a theoretical investigation of electroconvection emergence and development near an ion-selective area under a uniform electrolyte solution flow through this area are presented in the paper. The linear stability analysis of a stationary solution has allowed obtaining the dependence of the critical electric potential difference (that triggers electrokinetic instability) on the external flow rate. Two-dimensional numerical simulation has revealed the peculiarities of nonlinear electroconvection regimes. The research has proven the stabilizing effect of the external flow: electroconvection occurs at larger potential differences, whereas its regimes change each other faster with increasing the potential difference. Understanding these effects is useful in applications like the development of analyte preconcentration systems in microlaboratories for chemical analysis of biological liquids.

作者简介

G. Ganchenko

Laboratory of electro- and hydrodynamics at micro- and nanoscale, Financial University under the Government of the Russian Federation

Leningradsky Prospekt, 49/2, Moscow, 125167 Russia

V. Shelistov

Laboratory of electro- and hydrodynamics at micro- and nanoscale, Financial University under the Government of the Russian Federation

Email: shelistov_v@mail.ru
Leningradsky Prospekt, 49/2, Moscow, 125167 Russia

I. Olberg

Institute of Mathematics, Mechanics and Computer Sciences named after I.I. Vorovich, Southern Federal University

Milchakova St., 8A, Rostov-on-Don, 344090 Russia

I. Morshneva

Institute of Mathematics, Mechanics and Computer Sciences named after I.I. Vorovich, Southern Federal University

Milchakova St., 8A, Rostov-on-Don, 344090 Russia

E. Demekhin

Laboratory of electro- and hydrodynamics at micro- and nanoscale, Financial University under the Government of the Russian Federation; Laboratory of general aerodynamics, Institute of Mechanics of Lomonosov Moscow State University

Leningradsky Prospekt, 49/2, Moscow, 125167 Russia; Michurinsky Ave., 1, Moscow, 119192 Russia

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