A particle-free surface coupled model has been developed using the Eulerian–Eulerian approach for revealing the gas–steel–slag multiphase flow in the vacuum chamber of a 210-ton RH degasser. The particle submodel preferred to predict the gas–steel and gas–slag interpenetrating phenomena, while the free surface submodel focused on tracking the steel–slag interface flow. The mesh sensitivity analysis has been investigated, and the coupled model was validated by the measured values. Using this coupled model, some previously unknown problems about multiphase flow in the vacuum chamber were revealed, such as the effect of the free surface fluctuation, variation of the liquid level, and slag flow behavior.

使用欧拉-欧拉方法开发了一个无颗粒表面耦合模型，用于揭示 210 吨 RH 脱气机真空室中的气体-钢-渣多相流。粒子子模型倾向于预测气-钢和气-渣互穿现象，而自由表面子模型侧重于跟踪钢-渣界面流动。研究了网格敏感性分析，并通过测量值验证了耦合模型。使用这种耦合模型，揭示了真空室内多相流的一些先前未知的问题，例如自由表面波动的影响、液位变化和渣流行为。