The distinction of instability and turbulence between the Taylor-Couette flow and electrically driven flow in annular channel

X.Y. Leng (1, 2) , D Krasnov (2) , Y Kolesnikov (2) , B.W. Li (3)

1 Key Laboratory of National Education Ministry for Electromagnetic Processing of Materials
2 Institute of Thermodynamics and Fluid Mechanics
3 Institute of Thermal Engineering

The comparative study of turbulence in rotating flow under uniform axial magnetic field is considered. Two different systems of Taylor-Couette flow (TCF) and electrically driven flow (EDF)[1] are analyzed in the same annulus geometry applying fully-3D numerical simulations [2]. The approximation of low magnetic Reynolds number, corresponding to liquid metal flows, is used. In the case of TCF, the shear flow is driven by inner cylinder, and the EDF is driven by the mean Lorentz force, which is a product of applied field and electric currents injected in the radial direction. The latter mimics the case of pressure driven flows. Therefore, despite similar geometry, the mechanisms of generation of shear and turbulence are different, as well as potential routes to the suppression of eddies by magnetic field. The resemblances and differences of turbulent behaviors of both flows are revealed in present study.

Mots clés: Taylor-Couette flow; electrically driven flow; turbulence

Domaines: Sciences de l'ingénieur [physics]

X.Y. Leng, D Krasnov, Y Kolesnikov, B.W. Li. The distinction of instability and turbulence between the Taylor-Couette flow and electrically driven flow in annular channel. 8th International Conference on Electromagnetic Processing of Materials, Oct 2015, Cannes, France. ⟨hal-01333868⟩