A flow channel is a significant factor determining the performance of vanadium redox flow batteries (VRFBs). In this study, we use a three-dimensional numerical model to investigate the complexities of the fluid dynamics and electrochemical reactions of VRFBs considering a number of serpentine design flow channels. The results show that cell voltage increases with the reduction in the number of flow channels and increase in the electrolyte flow rate during the discharging process. The higher electrolyte flow rate significantly improves the uniformity of vanadium concentration at both electrodes. We observe that the pressure drop in the VRFB cell decreases with increasing number of flow channels. Moreover, the electrolyte disturbance and flow resistance reduces when the number of flow channels increases, which lead to a smaller pressure drop. As a result, the pumping power derived from the pressure drop decreases with the increase in the number of flow channels. The maximum power-based efficiency calculated for the quadruple serpentine design flow channel at an electrolyte flow rate of 60 ml/min is 97.18%. This serpentine design shows the lowest pumping power and achieves the optimum power-based efficiency. The proposed numerical approach provides comprehensive insights into serpentine design flow channel configurations for VRFBs.

流动通道是决定钒氧化还原液流电池（VRFB）性能的重要因素。在这项研究中，我们使用三维数值模型来研究考虑许多蛇形设计流动通道的VRFB的流体动力学和电化学反应的复杂性。结果表明，在放电过程中，电池电压随着流道数量的减少而增加，并且电解质的流量增加。较高的电解质流速显着改善了两个电极上钒浓度的均匀性。我们观察到VRFB池中的压降随着流动通道数量的增加而降低。此外，当流动通道的数量增加时，电解质干扰和流动阻力减小，这导致较小的压降。结果，源自压降的泵送功率随着流道数量的增加而降低。在电解质流速为60 ml / min时，四重蛇形设计流动通道的最大功率效率为97.18％。这种蜿蜒的设计显示出最低的泵浦功率，并实现了最佳的基于功率的效率。拟议的数值方法为VRFB的蛇形设计流通道配置提供了全面的见解。这种蜿蜒的设计显示出最低的泵浦功率，并实现了最佳的基于功率的效率。拟议的数值方法为VRFB的蛇形设计流通道配置提供了全面的见解。这种蜿蜒的设计显示出最低的泵浦功率，并实现了最佳的基于功率的效率。拟议的数值方法为VRFB的蛇形设计流通道配置提供了全面的见解。