Interfacial Instabilities and Waves in the Presence of a Transverse Electric Current
In metals processing there are a number of situations where an electric current passes through a fluid interface (slag or electrolyte above and molten metal below, for instance). An experiment using mercury and salt water has shown that instabilities and waves may develop on such interfaces. Neutral curves deduced from linear analysis, which may have one, two, or three minima, show that different modes may become unstable. A first attempt to study the non-linear behaviour of these instabilities, based on multiple scales technique, is also presented.
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