Highly resolved measurement and simulation of gas jet impingement onto a free metal melt surface

• Applicant: Professor Dr.-Ing. Rüdiger Schwarze
• Subject Area: Fluid Mechanics
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 425860464

In the production of crude steel in the BOF process, oxygen is blown into the pig iron melt via a Laval nozzle. The proposed project aims to investigate details of the interactions between the supersonic gas flow and the molten metal bath. The focus is on the transient behavior of the free melt surface, the formation of metal droplets and the interactions with the complex structured gas flow field. In a new model experiment, time-resolved large-scale PIV measurements of the melt surface and also Schlieren measurements of the gas flow are performed. CFD simulations of the transient multiphase flow consisting of molten metal, gas in the supersonic and subsonic areas as well as the metal droplets complete and complement the investigations. Important parameters and relationships between process, material and flow quantities should be determined from the evaluation of measurement results and simulation data.

• DFG Programme: Research Grants