Teorie a aplikace magnetofluidni mechaniky.

The shaping of a liquid metal drop using high-frequency magnetic fields is investigated experimentally, numerically and analytically. The motivation for this study comes from electron beam evaporation of liquid metals. In this process, turbulent convection within the melt leads to highly unwelcome heat losses through the water-cooled side walls of the crucible. Therefore, to increase efficiency, it would be favourable to fix the melt puddle horizontally by magnetic field. In the experiments drops of the low-melting liquid metal GaInSn are used. The drop surface is submitted to electromagnetic pressure generated by an inductor that is fed by high-frequency electrical current. I record the contour of drops of variable volume while varying inductor current and frequency. The results are compared with predictions of both a simple analytical model and numerical simulations.Summery also in German.Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi