Computational fluid dynamics (CFD) is an effective tool to investigate the transfer phenomena in Rheinstahl–Heraeus (RH), which is a multifunctional vacuum refining reactor with various chemical reactions. However, the reported mathematical models, which are based on the assumption of steady Ar–molten steel flow, ignore the CO gas generated by the chemical reaction between carbon and oxygen in RH. Herein, Based on the algebraic slip model, a two-way coupling model (T-WCM) is developed to explore the unsteady fluid flow (CO–Ar–molten steel) and mass transfer phenomena during decarburization chemical reaction. The measured data from the water model experiment and the industrial experiment are used to validate the numerical results. The carbon mass concentration predicted by T-WCM is closer to the result from industrial experiment than that predicted by one-way coupling model (O-WCM). The mole number of CO gas is about 3 times that of argon gas injected into RH, and the stirring effect of CO gas leads to a more complicated multiphase flow, enhances the mass transfer and prompts the reaction rate. Therefore, the gas–liquid flow and decarburization process in RH can be described more precisely only when CO gas is considered by T-WCM.

中文翻译：

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CO-Ar-钢水流与莱茵斯塔尔-贺利氏脱碳反应的相互作用

计算流体动力学 (CFD) 是研究莱茵斯塔尔-贺利氏 (RH) 中传递现象的有效工具，RH 是具有各种化学反应的多功能真空精炼反应器。然而，所报道的数学模型基于稳定的 Ar 钢液流动假设，忽略了碳和氧在 RH 中的化学反应产生的 CO 气体。在此，基于代数滑移模型，开发了双向耦合模型（T-WCM）来探索非定常流体流动（CO - Ar -钢水）和脱碳化学反应过程中的传质现象。利用水模型实验和工业实验的实测数据对数值结果进行验证。T-WCM 预测的碳质量浓度比单向耦合模型（O-WCM）预测的更接近工业实验的结果。CO气体的摩尔数是注入RH的氩气摩尔数的3倍左右，CO气体的搅拌作用导致更复杂的多相流动，增强了传质，促进了反应速率。因此，只有当 T-WCM 考虑 CO 气体时，才能更精确地描述 RH 中的气液流动和脱碳过程。