SIMULATION OF GAS INJECTION INTO LIQUID MELTS

Gas injection is used in several metal smelting and refining operation s to increase mixing in the melt and as a carrier far particle additio n. Same of the fluid dynamical phenomena that occur in liquid baths wh en injected with gas are discussed. Mathematical models for simulating three of these phenomena are described: a two-fluid model for simulat ing bath circulation is compared with data obtained in air-water exper iments; a technique that allows the swelling of the bath surface to be simulated is illustrated; and a mathematical model for the prediction of wave motion in gas-agitated baths is summarized.