The oscillating-cup viscometer placed in the magnetic field: the experiments under liquid gallium

Metal melts have such conductivity, that magneto-hydrodynamic effects can be easily observed even in moderate magnetic fields (around 0.01T) under conditions achieved in conventional physicochemical experiments. This fact gives an opportunity to create new methods of analyzing metal melts properties. Current work represents the experiments with the oscillating cup viscometer placed in the uniform steady longitudinal magnetic field. The oscillation' parameters dependencies on magnetic induction of the applied magnetic field have been measured. To record the motion of the viscometer the new optical scheme, which allows writing down quasi-continuously viscometer's angle position, has been implemented. Estimation of oscillation' parameters values (oscillation' decrement and period) has been evaluated with the aid of wavelet analysis and optimization methods. Field dependences of oscillation' parameters were being used for liquid gallium viscosity and electrical conductivity determination with the help of the viscosimetric theory, that was earlier suggested by us