Two phase electrolysis process From the

During two-phase electrolysis for aluminium, fluorine or hydrogen production, bubbles are created at the electrode, which implies significant hydrodynamic acceleration, as well as notable electrical field disturbances, impacting electrochemical processes. These disturbances can modify local current density and potentially lead to anode effects. There is a scarcity of local experimental measurements regarding chemical composition, temperature, or current density in these aggressive environments (high temperature and strong reactivity). Thus, modeling and numerical simulation emerge as essential tools for understanding and optimizing these processes, despite the challenges of validating numerical results rigorously. This study aims to model and numerically simulate local gas production at an industrial-scale vertical electrode. Since bubbles influence the transport of species, heat, and electricity, strong coupling exists among these phenomena and between bubble-scale and macroscopic processes. Investigating phenomenological laws at the bubble scale is necessary because bubbles are the source of macroscopic disturbances. The finite volume methods implemented in Fluidyn® and Fluent® software were used for this simulation.