Examination And Numerical Simulation Of Interphase Forces In Metal Melt-Bubble Two-Phase Flow

The study of interphase force for two-phase flow has important significance on the prediction of numerical simulation results when two-fluid model with Eulerian-Eulerian approach is applied to simulate the foam aluminium forming process by gas injection. In this paper, the effects of drag force, lift force and virtual mass force on the bubble distribution and fluid flow in the metal melt-bubble two phase flow was studied.By2D simulation on the gas jetting into parallel reciprocating stirred molten metal flow with high temperature, we analyzed the effects of lift force and drag force with different models including Ishii and Zuber model, Liu model, Ohmori and Ishii model, Grevskott and Sannaes model, Tsuchiya and Furumoto model, Schiller and Naumaan model, Dalla Ville model, Zhang and Vanderheyden model, Universal model on the gas-liquid flow in laminar flow. Considering the turbulence model for practical consideration, the effects of drag force, lift force and virtual mass force on the gas-liquid system were investigated.From the results of simulation and calculation, we get that it will produce different numerical simulation results according to the different drag models when at the state of laminar flow, and it will bring different simulation results due to different drag model when considering lift force. When consider the turbulent of gas-liquid two-phase flow, k-e turbulence model for each phase is employed to simulate the metal melt-bubble two phase flow, the gap between numerical simulation results because of different drag models which associated with Re number disappeared, and the lift force showed similar effect on numerical simulation results with laminar flow. Particularly, no matter laminar flow or turbulent flow, the lift force has little influence for Universal model.