电磁场作用下中铝合金熔体流动的混沌特征的仿真与分析.PDF

25 11 2015 11 Volume 25 Number 11 The Chinese Journal of Nonferrous Metals November 2015 1004-0609(2015)-11-3026-07 1 2 2 (1. 341000 2. 341000) Fluent Lyapunov Kolmogorov 515 30 Hz Lyapunov 0Kolmogorov Lyapunov Kolmogorov TG292 TP391.9 A Simulation and analysis on chaotic characteristic of flow in Al alloy melt under electromagnetic field 1 2 2 LIU Zheng , ZHANG Jia-yi , YU Zhao-fu (1. School of Mechanical and Electronic Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China; 2. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China) Abstract: In order to find out the flow features of Al alloy melt under the electromagnetic fieldthe trajectories of the particle in Al alloy melt was simulated by the computational fluid dynamics software Fluent, and the chaotic characteristic parameters such as max Lyapunov exponent and Kolmogorov entropy were calculated, and they were used to characterize the trajectories of three groups. The chaotic characters on the flow trajectories of Al alloy melt were judged and analyzed according to the traj ectories of the particle in the melt under the electromagnetic field. The results show that there is chaotic character for flow in Al alloy melt under electromagnetic field. Chaotic advection happens in the melt at different frequenci