Instability mechanisms and transition scenarios of spiral turbulence in Taylor-Couette flow

Meseguer, A., Mellibovsky, F., Avila, M. and Marques, F.

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(b) (R_o,R_i)=(-1200,600)

FIG. 1. Spiral turbulence between counterrotating concentric cylinders (outer cylinder rotating clockwise). (b) Annular cross section of axial vorticity distribution.

(c) ISP, R_i=480	(d) INT, R_i=520

(e) INT, R_i=530	(f) SPT, R_i=600

FIG. 5. Radial vorticity at intermediate radial surface r_m=8.21 for R_o=-1200. ISP, interpenetrating spirals; INT, intermittency; SPT, spiral turbulence.