Flow hydrodynamics and mass transfer have been investigated using numerical simulation and validated using experimental measurements. UV–vis measurements have been obtained to determine the apparent heterogeneous rate constant, k_app, and adsorption–desorption equilibrium constant, K, of the electrochemical oxidation of p-methoxyphenol (PMP). Generation of gas bubbles was visualized using a high-speed camera, and MATLAB was used to obtain the average void fraction. The experimental results show good agreement with simulation results. Two-phase bubbly flow has been described by a mathematical model based on the Euler–Euler approach. To accurately predict the two-phase bubbly flow in an electrolyzer, a developed model of interfacial area concentration has been adopted for bubble size effects. This study shows that different operating conditions affect the void fraction and gas bubble layer. Additionally, the mass transfer efficiency and mass transfer correlations have been investigated in order to design the optimal experiments for electrochemical oxidation.

中文翻译：

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CFD预测电化学氧化的流体动力学和传质研究及实验验证

流动流体动力学和传质已经使用数值模拟进行了研究，并通过实验测量得到了验证。已经进行了紫外可见测量，以确定p的电化学氧化的表观非均相速率常数k _app和吸附-解吸平衡常数K。-甲氧基苯酚（PMP）。使用高速照相机观察气泡的产生，并使用MATLAB获得平均空隙率。实验结果与仿真结果吻合良好。已经通过基于欧拉-欧拉方法的数学模型描述了两相气泡流。为了精确地预测电解槽中的两相气泡流动，已采用界面面积浓度的已开发模型来实现气泡尺寸效应。这项研究表明，不同的操作条件会影响空隙率和气泡层。另外，已经研究了传质效率和传质相关性，以设计电化学氧化的最佳实验。