AM06-13-014 回転系において潮流が形成する海底境界層の不安定(大気・海洋・惑星の流れ(3),一般講演)

概要

論文の詳細を見る
To investigate instability of the bottom boundary layer induced by tidal flow (oscillating flow) in a rotating frame, numerical experiments have been carried out with a three-dimensional non-hydrostatic model. Three types of instability are found depending on the temporal Rossby number Ro_t, the ratio of the inertial and tidal periods. When Ro_t<1.0, the Ekman type I instability occurs because the effect of rotation is dominant. When Ro_t>1.1, the Stokes layer instability is excited as in the absence of rotation. When 1.0<Ro_t<1.1, the thickening of the boundary layer enhances the contribution of the Coriolis effect to destabilization, so that the Ekman type II instability peculiar to a rotating frame tends to appear.
日本流体力学会の論文
2006-09-05