Buoyancy and solar spin-down.
The transition of a cylinder of water with a vertical density gradient between convective and viscous spindown occurs near the point at which the maximum buoyancy force equals the radial pressure gradient that is driving the convection. A similar analysis applied to the sun shows the maximum buoyancy force to be 1500 times the convective force. A rapidly rotating solar interior would not be damped by largescale convection.
Modisette
J L
JL
Novotny
J E
JE