抄録
In the transitional channel flow, the large-scale intermittent structure of localized turbulence, which is called turbulent stripe, can be found in the form of stripe arrangement. The structure of the turbulent stripe is laminar-turbulent banded pattern being oblique with respect to the streamwise direction. We performed the direct numerical simulation at the transitional Reynolds numbers and very low-rotation numbers and focused on the turbulent stripe in the plane Poiseuille flow subjected to spanwise system rotation. We captured the turbulent stripe in rotating channel flows and found the augmentation and diminution of the features characterizing the turbulent stripe by the spanwise rotation. The turbulent stripe is enhanced by the Coriolis instability: that is, the magnitude of the spanwise velocity component is intensified, while the quasi-laminar region is widened at low rotation numbers.
