Taylor columns in a shear flow and Jupiter's Great Red SPOT

Astronomy and Astrophysics – Astronomy

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Atmospheric Circulation, Jupiter Red Spot, Shear Flow, Taylor Instability, Astronomical Models, Atmospheric Composition, Flow Stability, Jupiter Atmosphere, Vorticity

Scientific paper

The present work briefly describes some results obtained in an experimental attempt to verify Cottrell's (unpublished) theoretical analysis of the formation of a Taylor column when a slow, steady flow passes an obstacle in a rotating fluid. These results support qualitatively the prediction that in shear flows of negative vorticity, Taylor columns can be expected to form in the presence of all obstacles of finite height, whereas for uniform flow or for positive shear flow, a minimum obstacle height is required for Taylor column formation. Jupiter's Great Red Spot occupies one of the few regions of high negative vorticity on Jupiter, so conditions for the formation of a Taylor column here are particularly favorable.

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