Velocity field of the spiral vortex flow in the Couette-Taylor system Nizar Abcha, Olivier Crumeyrolle, Alexander B. Ezersky and Innocent Mutabazi Eur. Phys. J. E, 36 3 (2013) 20 Published online: 07 March 2013 DOI: 10.1140/epje/i2013-13020-5