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首页> 外文期刊>Russian journal of electrochemistry >Numerical simulation of natural convection of electrolyte solution with three types of ions in the electrochemical cell with vertical electrodes
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Numerical simulation of natural convection of electrolyte solution with three types of ions in the electrochemical cell with vertical electrodes

机译：垂直电极电化学电池中三种离子对电解质溶液自然对流的数值模拟

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摘要

The mass transfer in the electrolyte solution with three types of ions in the electrochemical cell of square section with vertical electrodes is studied. The mathematical model of the process involves the Navier-Stokes equations in the Boussinesq approximation, the equations of ionic transfer of electrolyte components, which is caused by diffusion, convection, and migration, and the condition of electroneutrality. It is shown that this problem corresponds to a special case of thermosolutal convection with regard for thermodiffusion (the Soret effect), where the cell boundaries are permeable to an impurity and the flux of impurity through the boundary is proportional to the heat flux. Using the numerical simulation, the distributions of concentration of ions, solution density, local and average mass-transfer rates are studied. The approximate analytical equations for the limiting current are obtained for typical electrochemical systems.
机译：研究了具有垂直电极的方形截面电化学电池中三种离子在电解质溶液中的传质。该过程的数学模型涉及Boussinesq近似中的Navier-Stokes方程，由扩散，对流和迁移引起的电解质成分的离子转移方程，以及电中性条件。结果表明，该问题对应于热扩散（Soret效应）的热固对流的一种特殊情况，其中，细胞边界可渗透杂质，并且杂质通过边界的通量与热通量成正比。使用数值模拟研究了离子浓度，溶液密度，局部和平均传质速率的分布。对于典型的电化学系统，获得了极限电流的近似解析方程。

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