湍流二元电解质流动和传质特性的数值模拟

Numerical Simulation of Binary Electrolyte under Turbulent Channel Flow

应用计算流体力学(computational fluid dynamics,CFD)、传质学和电化学理论,建立了二元电解质溶液湍流运动的物理和数学模型.针对恒电流情况,通过数值计算研究了电解质溶液的传质和运动特性,讨论电解质溶液平均浓度场随电解时间的演变规律和电解质湍流流场结构,分析不同Schmidt数以及交换电流密度大小对电解质溶液平均浓度场和脉动场的影响.

Based on the computational fluid dynamics （CFD）, the mass transfer and electrochemistry theories, a model for turbulent electrode channel flow is established. The turbulent mass transfer in electrolytic processes is predicted with a direct numerical simulation method under galvanostatic condition. This paper investigates the mean concentration and the structure of concentration fluctuating fields for different Schmidt numbers. The effect of concentration boundary condition at the electrodes on the near-wall turbulence statistics is also discussed.