MULTIPHASE FLOW SIMULATION IN MOLD FILLING PROCESS WITH LEVEL SET METHOD
In order to simulate the gas entrapment during the mold filling process, a multiphase flow model is adopted, which can calculate the velocity and pressure of the gas, and its effect on the liquid flow. The difficulty in simulation of multiphase flow comes from great change of physical parameters (e.g., density and viscosity) across the interfaces. The Level Set method for moving interfaces, especially accompanying topological change of interfaces, has been developed recently and drawn wide attention. The main advantage of Level Set is its efficiency to deal with complex interfaces, even if topology changes. This method allows for large density ratio without reconstructing the numerical grid. In this paper, the liquid-gas two-phase flow is simulated using a combination of Level Set method and SOLA method. SOLA is used to compute the Navier-Stokes equation, and Level Set method is used to track the interfaces between the liquid and the gas during mold filling process. The experimental and simulation results suggest that the Level Set method can reasonably revealed the physical mechanisms and the method is quite promising in simulating the behaviors of moving interfaces in liquid-gas multiphase flows. Based on the numerical results obtained in the paper, both the merits and shortcomings of the Level Set method are analyzed, and directions of future studies improving this method are pointed out at the same time.
multiphase flow mold filling Level Set method casting
Jing HAO Liliang CHEN Dimming LIAO Jianxin ZHOU
State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology Luoyu Road 1037 Wuhan, 430074, China
国际会议
大连
英文
51-61
2007-08-19（万方平台首次上网日期，不代表论文的发表时间）