Mathematical modelling of gravitational convection in electrodialysis processes

被引：20
|
作者：
Pismenskiy, Alexander
Nikonenko, Victor
Urtenov, Makhamet
Pourcelly, Gerald
机构：
[1] Univ Montpellier 2, Inst Europeen Membranes, F-34095 Montpellier 5, France
[2] Kuban State Univ, Dept Chem Phys, Krasnodar 350040, Russia
来源：
DESALINATION | 2006年 / 192卷 / 1-3期
基金：
俄罗斯基础研究基金会;
关键词：
electrodialysis; ion-exchange membranes; mathematical modelling; concentration polarisation; gravitational and forced convection; diffusion boundary layer;
D O I：
10.1016/j.desal.2005.06.054
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Two 2D models of non-stationary and non-isothermal transfer of a strong binary electrolyte in a rectangular electrodialysis desalination cell formed by anion- and cation-exchange membranes are developed. Both gravitational and forced convection occurring in underlimiting current mode are taken into account. A boundary problem for the system of equations including Navier-Stokes, Nemst-Planck, Fourier and material balance equations is numerically solved. Results obtained with both models are analyzed and compared. It is shown that the direction of the electric current in the channel is close to perpendicular to the membrane surfaces.
引用
收藏
页码：374 / 379
页数：6
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