中国物理B ›› 2013, Vol. 22 ›› Issue (12): 124703-124703.doi: 10.1088/1674-1056/22/12/124703
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
陈国军a, 张永杰b, 杨院生c
Chen Guo-Jun (陈国军)a, Zhang Yong-Jie (张永杰)b, Yang Yuan-Sheng (杨院生)c
摘要: A numerical model for the unsteady flow under a pulsed magnetic field of a solenoid is developed, in which magnetohydrodynamic flow equations decouple into a transient magnetic diffusion equation and unsteady Navier–Stokes equations in conjunction with two equations of the k–ε turbulent model. A Fourier series method is used to implement the boundary condition of magnetic flux density under multiple periods of a pulsed magnetic field (PMF). The numerical results are compared with the theoretical or experimental results to validate the model under a time-harmonic magnetic field; it is found that the toroidal vortex pair is the dominating structure within the melt flow under a PMF. The velocity field of a molten melt is in a quasi-steady state after several periods; changing the direction of the electromagnetic force causes the vibration of the melt surface under a PMF.
中图分类号: (Magnetohydrodynamics and electrohydrodynamics)