Abstract
We present a theoretical weakly nonlinear analysis of the dynamics of an inviscid flow submitted to both rotation and precession of an unbounded cylindrical container, by considering the coupling of two Kelvin (inertial) waves. The parametric centrifugal instability known for this system is shown to saturate when one expands the Navier-Stokes equation to higher order in the assumed small precession parameter (ratio of precession to rotation frequencies) with the derivation of two coupled Landau equations suitable to describe the dynamics of the modes. It is shown that an azimuthal mean flow with differential rotation is generated by this modes coupling. The time evolution of the associated dynamical system is studied. These theoretical results can be compared with water experiments and also to some numerical simulations where viscosity and finite length effects cannot be neglected.
Original language | English (US) |
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Pages (from-to) | 369-401 |
Number of pages | 33 |
Journal | Geophysical and Astrophysical Fluid Dynamics |
Volume | 104 |
Issue number | 4 |
DOIs | |
State | Published - 2010 |
Keywords
- Hydrodynamics
- Mode coupling
- Rotation, Precessing flows
- Weakly nonlinear analysis
ASJC Scopus subject areas
- Computational Mechanics
- Astronomy and Astrophysics
- Geophysics
- Mechanics of Materials
- Geochemistry and Petrology