Figure 1
From: Magnetic field induced flow pattern reversal in a ferrofluidic Taylor-Couette system
Flow structures in absence of any magnetic field.
Flow states of WVF2,3 (left panels) and WVF3,2 (right panels) for 
and 
. (a) Isosurfaces of 
. Red (yellow) color indicates positive (negative) vorticity. For clear visualization, two periods are plotted in the axial direction. The arrows below the snapshots illustrate the rotational direction (appearing laterally on the cylinders), which is pro-grade for both wavy flows. Note, here and in the following the rotation direction always refers to the pattern rotation. Contours of the flow structures: (b) radial velocity 
on an unrolled cylindrical surface in the annulus at mid-gap, (c) azimuthal vorticity 
in the 
plane at mid-height and (d) vector plots 
of the radial and axial velocity components in a constant θ = plane, including the azimuthal vorticity 
. The two points mark the centerline of vortices within the illustrated plane. Note that this position is θ-dependent but the azimuthal averaged position for WVF3,2 is closer to the inner cylinder than for WVF2,3. All contours are color coded from red (dark gray - minimum) to yellow (light gray - maximum). See also movie files movie1.avi and movie2.avi in SMs.
