A Review on Investigation of different methods for measuring molten metal viscosity

In many manufacturing process which are based on melting and solidification, like casting, measurement of viscosity and prediction of fluidity of molten metal in variant temperatures and alloy composition could improve quality of process and decreasing losses. In this paper different methods for measurement of viscosity like capillary method, oscillating vessel viscometer, falling body or counterbalanced sphere viscometer, oscillating plate method, rotating cylinder and … have been investigated. Arrhenius equation, Andrade treatment, Hildebrand’s free volume theory, Chhabra model and … are the models which were used for estimation of viscosity of metals and alloys and their relation with temperature. Finally comparison of different procedure for viscosity measurement of molten metals is presented.