Abstract
Direct numerical simulations of a spectral method were performed to study turbulent structure and heat transfer mechanism in Couette flow at transitional region under stable system rotation. To compare the flow structure, we also calculate the same friction Reynolds number flow without any rotations. The Prandtl number is 0.71 to assume air. A stable system rotation makes the flow relaminarising, turbulent stripes are observed near the walls, though the stripe is not observed in the flow at same friction Reynolds number condition without system rotation. The turbulent region enhances both friction and heat transfer, and temporal oscillations were occurred due to the advection of the turbulent region.
