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Movie 1 Numerical simulation of type B (non-reversing)
Taylor vortex flow between two concentric cylinders. The outer
cylinder (right boundary) is held stationary whereas the inner
cylinder (left boundary) rotates harmonically about a
zero-mean with
Re(t)=Rea sin(&omegat). Centrifugal
instability is triggered every half-period and results in
synchronous secondary Taylor vortex flows. In the high
frequency regime shown in this movie, this instability is
manifested by angular momentum jets erupting from the inner
cylinder at a fixed axial location. Angular momentum
(&omega&theta) and azimuthal vorticity
(rv&theta) are shown in a meridional cross-section
at ω=6.1 and Rea=240. Red (blue)
corresponds to positive (negative) values. The wavenumber of
the axially periodic pattern is kB=3.4. The
movie corresponds to figure 8 in the paper.
Download movie 1.
Movie 2 Numerical simulation of type A (reversing)
Taylor vortex flow at ω=1 and Rea=240
with wavenumber
kA=3.0. In the low frequency regime shown in
this movie, the angular momentum jets shift their locations by
half the wavelength of the pattern when the inner cylinder
reverses its direction of rotation. Angular momentum and
azimuthal vorticity are shown in a meridional
cross-section. Red (blue) corresponds to positive (negative)
values. The movie corresponds to figure 10 in the paper.
Download movie
2.
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