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The solidified structure of the different types of alloys (e.g. hypoeutectic Al-Si alloys) can be modified by melt stirring during the solidification. According to the solidification experiments it has been stated that it is very important to know the method and intensity of stirring. In order to check the flow conditions during the solidification preliminary tests were carried out. Liquid gallium as model material was chosen for the 'cold' experiments. Gallium is a suitable material for visualisation of the melt flow near the room temperature because of its low melting point (29.8 deg C). The aim of experiments was to measure the revolution number of rotating liquid gallium and to compare this value to the synchronous revolution number of rotating magnetic field. A three-phase inductor generated the magnetic field. The revolution number of flow was determined numerically with two different methods. On the basis of these measurements the characteristics of melt flow caused by rotating electromagnetic field in case of solidification of Al-Si-Mg alloy can be well followed.