We present an experimental visualization and discretized modeling study of centrifugal spinning,which is a novel and scalable method of producing nanofibers.The investigation was conducted using Newtonian and viscoelastic liquids to study the effect of viscoelasticity,flowrate and driving force on the initial thinning behavior,jet contour shapes and radii.Newtonian polybutelene(PB)and viscoelastic polyisobutelene(PIB)-based Boger fluids were utilized as test fluids in the study.Our results reveal that increasing the viscoelasticity leads to a faster initial thinning of the polymer jet.However,the effect is strongly coupled with the rotation speed,and due to a faster increase in extensional viscosity for highly viscoelastic fluids,the thinning slows down with the increase in angular velocity.Initial thinning is shown to be faster for the lower flow rates.Viscoelasticity and centrifugal force have a significant influence on the jet contour radii.The maximum radius decreases for more viscoelastic fluids,and with the increase in angular velocity,in a certain range of rotation speeds.The comparison with the discretized element modeling is reported to confirm the model predictive potential.Results from the centrifugal spinning experiments are compared to electrospinning in order to observe a qualitative similarity.