Akimasa Yamaguchi

Fluid flow in a rotating cylindrical container with a rotating disk at the fluid surface

Fluid flow in a rotating cylindrical container of radius Rw and height H with a co-axially rotating disk of radius Rd at the fluid surface is numerically investigated. The container and the disk rotate with angular velocities Ωw and Ωd, respectively. We solve the axisymmetric Navier-Stokes equations using a finite-volume method. The effects of the relative directions and magnitudes of the disk and container rotations are studied. The calculations are carried out with various ratios of Ωw and Ωd for H/Rw = 2 and Rd/Rw = 0.7. Streamlines and velocity vectors in the meridional plane and azimuthal velocities are obtained. The flow fields in the meridional plane are discussed with relation to azimuthal velocities in the interior of the container. The numerical results are also compared with experimental data.

Computation Transport Phenomena in Chemical Engineering. Numerical Simulation of Fluid Flow and Heat Transfer in a Rotating Cylindrical Container with a Counter-Rotating Disk at the Fluid Surface.

回転円筒と液面で共軸に逆回転する円板とからなる容器内の流動および伝熱現象を数値解析的に調べた.円板回転の大きさおよび流体のプラントル数が容器内の流動および伝熱特性に与える影響を考察した.円板の回転レイノルズ数および流体のプラントル数を変化させて流れ場および温度場を求め, 各々の壁面の平均ヌッセルト数を温度場から計算した.平均ヌッセルト数の計算結果について既存の実験結果と比較した.