TY - JOUR
T1 - Mean zonal flows generated by librations of a rotating spherical cavity
AU - Busse, F.H.
N1 - © Cambridge University Press 2010
PY - 2010/5/10
Y1 - 2010/5/10
N2 - Longitudinal librations represent oscillations about the axis of a rotating axisymmetric fluid-filled cavity. An analytical theory is developed for the case of a spherical cavity in the limit when the libration frequency is small in comparison with the rotation rate, but large in comparison with the inverse of the spin-up time. It is shown that longitudinal librations create a steady zonal flow through the nonlinear advection in the Ekman layers. The theory can be applied to laboratory experiments as well as to solid planets and satellites with a liquid core.
AB - Longitudinal librations represent oscillations about the axis of a rotating axisymmetric fluid-filled cavity. An analytical theory is developed for the case of a spherical cavity in the limit when the libration frequency is small in comparison with the rotation rate, but large in comparison with the inverse of the spin-up time. It is shown that longitudinal librations create a steady zonal flow through the nonlinear advection in the Ekman layers. The theory can be applied to laboratory experiments as well as to solid planets and satellites with a liquid core.
UR - http://www.scopus.com/inward/record.url?scp=77952428123&partnerID=8YFLogxK
U2 - 10.1017/S0022112010000753
DO - 10.1017/S0022112010000753
M3 - Article
AN - SCOPUS:77952428123
SN - 0022-1120
VL - 650
SP - 505
EP - 512
JO - Journal of Fluid Mechanics
JF - Journal of Fluid Mechanics
ER -