%0 Journal Article %T Effect of Viscosity on Pumping-Up of Newtonian Fluid Driven by a Rotating Cone %A Takahiro Adachi %A Yutaro Takahashi %A Takeshi Akinaga %A Junnosuke Okajima %J Journal of Flow Control, Measurement & Visualization %P 57-65 %@ 2329-3330 %D 2018 %I Scientific Research Publishing %R 10.4236/jfcmv.2018.62006 %X Effect of viscosity on flow patterns of pumping-up of liquid generated by a cone rotating at the liquid surface has been experimentally studied with various concentrations of glycerol aqueous solution. We have previously found that the higher viscous non-Newtonian fluid was lifted-up along the conical surface with a radial filament-wise pattern, which is quite different from the monotonic thin film-wise pattern observed for the lower viscous fluid such as water. In order to elucidate the pumping-up mechanism, a transition diagram indicating the critical rotation rate is obtained as a function of viscosity of Newtonian fluid in this study, varying from the lower value of water (米 = 0.890 mPa﹞s) to the higher one of glycerin (米 = 910 mPa﹞s). It is found that there are three categories depending on the viscosity classified as 1) film-wise pumping-up region for the viscosity 米 ≒ 134 mPa ﹞s, 2) filament-wise pumping-up one for the viscosity 米