Hydrodynamic turbulence in quasi-Keplerian rotating flows [CL]


We report a direct-numerical-simulation study of Taylor-Couette flow in the quasi-Keplerian regime at shear Reynolds numbers up to $\mathcal{O}(10^5)$. Quasi-Keplerian rotating flow has been investigated for decades as a simplified model system to study the origin of turbulence in accretion disks that is not fully understood. The flow in this study is axially periodic and thus the experimental end-wall effects on the stability of the flow are avoided. Using optimal linear perturbations as initial conditions, our simulations find no sustained turbulence: the strong initial perturbations distort the velocity profile and trigger turbulence that eventually decays.

Read this paper on arXiv…

L. Shi, B. Hof, M. Rampp, et. al.
Fri, 10 Mar 17

Comments: 14 pages, 10 figures