The shape of liquid metal jets under a uniform vertical magnetic field. (2nd Report. Analysis of jets issuing from nearly circular nozzles).

Abstract

The shape of a horizontal slender jet of a liquid metal issuing from noncircular nozzles under a uniform magnetic field is discussed. The basic equations of MHD flows are simplified by neglecting the terms concerning viscosity, and the solutions of approximate analysis are presented. In the case without a magnetic field, The shape of the jet is definitely changed from its original shape by surface tension. It is found that a uniform vertical magnetic field can be used to prevent the shape change of molten metals without coming into direct contact with them. According to the strength of the applied magnetic field, the shape changes of the lowest mode are divided into three classes: damped, critical damping and overdamping oscillations. The parameters on which the magnetic shaping of jets are dependent are elucidated. The shapes obtained by the approximate analysis are shown to be in good agreement with those of experimental results.