Table 3.

List of the spherical Couette experiments discussed in the text

Experiment	Working fluid	Diameter (2R)	Ek order	Radius ratio ($r_i/R$)
30 cm	Liquid sodium	30 cm	${10}^{-7}$*	0.35
60 cm	Liquid sodium	60 cm	${10}^{-7}$	0.35
3 meter	Water/liquid sodium	3 m	${10}^{-8}$	0.35
DTS	Liquid sodium	42 cm	${10}^{-7}$	0.35
HEDGEHOG	GaInSn alloy	18 cm	${10}^{-4}$*	0.33, 0.5
Cottbus experiment	Silicone oil	24 cm	${10}^{-5}$	0.33

*Means that the experiments were run with outer sphere stationary. Ek for these cases is based on inner boundary rotation rate and radius and thus represents the inverse of the Reynolds number at inner boundary [see definitions (1,3)]