F223 回転球殻中のテイラーコラム型対流の外側安定成層への貫入

概要

論文の詳細を見る
Penetration of columnar convection in rapidly rotating spherical shells into a stably stratified layer near the outer shell is investigated. An analytical expression of the penetration thickness is derived by considering a fluid motion in a rotating stable Boussinesq fluid where the rotation axis is tilted against the gravity. It is shown that the penetration thickness is in proportion to the angular velocity of rotation of the system and the horizontal scale of the convection cells, and in inverse proportion to the Brunt-Vaisala frequency in the stably stratified layer. Structures of critical convection in rotating spherical shells with a stably stratified outer layer are calculated numerically. The dependency of penetration thickness on the extent of stratification is consistent with the analytical expression. The results suggest that the horizontal scale of deep convection which may produce mean zonal flow in Jovian atmosphere should be more than 1000km.
日本流体力学会の論文
2000-07-25