Abstract
A steady-state axisymmetric flow field of a liquid metal in a coreless induction furnace under an axisymmetric magnetic field is analyzed numerically, using a spectral finite difference method. Vorticity-stream function formulation is used in conjunction with Maxwell's equations, in a boundary-fitted coordinate system. For boundary conditions, both no-slip on the wall and no shear stress tensor on the free surface are used as dynamic conditions, and a field equivalent to the magnetic field induced by external coils is adopted as an electromagnetic field condition. Presented are streamlines, magnetic streamlines, and radial profiles of the axial velocity component at two Reynolds numbers for various parameters. It is found that the flow field varies remarkably according to the Reynolds number, the dimensionless height of the liquid metal, and the dimensionless height of external coils.
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