Schematic view of the rotating annulus

Some views of experimental apparatus

The properties of the annulus used for the streak images below are as follows:

The following parameters are the same for each experiment:

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Constant temperature gradient: DT = 4 K; Flow at 5 different height levels

Omega=0.3 rad/s Omega=1 rad/s Omega=2 rad/s Omega=3 rad/s
Level 1:
h = 12.6cm
Level 2:
h = 9.7cm
Level 3:
h = 7.0cm
Level 4:
h = 4.3cm
Level 5:
h = 1.6cm
Level 1:
h = 12.6cm

Constant rotation rate: Omega = 2 rad/s; Flow at 5 different height levels and 3 different DT

DT=1 K DT=4 K DT=20 K
Level 1:
h = 12.6cm
Level 2:
h = 9.7cm
Level 3:
h = 7.0cm
Level 4:
h = 4.3cm
Level 5:
h = 1.6cm
Level 1:
h = 12.6cm

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