1003 水平回転シリンダー内に部分的に満たされた液体の挙動

概要

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An experimental study was carried out for viscous liquid partially filled in a cylindrical container rotating about its horizontal axis at constant angular velocity. The behavior of liquid in a cylindrical container is affected by the centrifugal, gravitational and viscous forces. Olive oil with a high coefficient of viscosity was used as test liquid. The effects of the aspect ratio of the container and charged volume of liquid were examined in the rotational speed between the static state and solid body rotation. The results show that, in a certain range of the rotational speed between the static state and solid body rotation, the liquid partially filled in the cylinder forms a flow structure which looks just like a " bamboo joint " across the cross section of the cylinder with regular interval along the axis of the cylinder. It is noted that a pair of vortices rotating between the " bamboo joint " are clearly observed in the range of liquid volume 50∿90% of the cylinder. A pair of vortices is generated even in the lower rotational speed, before " bamboo joint " is formed.
一般社団法人日本機械学会の論文