Some metallurgical applications of magnetic fields. The role of model experiments and velocity measuring techniques.

Magnetic fields provide the possibility of a tailored flow control for metallurgical and crystal growth processes. Two examples will be presented: the application of a specially shaped steady magnetic field in the melt extraction process of thin metallic fibres, and the control of the flow filling process in the investment casting of aluminium alloys. The role of cold model experiments and the development of velocity measuring techniques for metallic melts will be stressed. As a final example, velocity measurements in a liquid metal switcher will be presented.