Behavior of stratified two liquid layers contained in a baffled vessel suddenly set in rotation

A cylindrical baffled vessel containing two liquids of different densities was rotated suddenly around its vertical axis. The interfacial area between the two liquids increased significantly through the effect of the baffle in the initial stage of rotation and the two liquids returned nearly to the initial state in the final stage of rotation. This phenomenon is very beneficial for promoting mixing of molten steel and slag and later separation of them. The maximum penetration depth of the upper liquid into the lower layer and the flow establishment time of the flow in the vessel were measured. Empirical equations were proposed for these quantities.