44 citations · 67 across the 9 of their papers we have counts for
9 papers
Ohmic and viscous damping of inner core translational oscillations
Paolo Personnettaz, David Cébron, Nathanaël Schaeffer +2
Large earthquakes can trigger translational oscillations of Earth's inner core (Slichter modes), yet their damping remains uncertain. Using simulations, we quantify viscous and Ohm…
Magnetohydrodynamic drag on an oscillating sphere in a rotating spherical cavity
David Cébron, Paolo Personnettaz
Oscillating-sphere drag is a classical fluid-mechanics problem, yet no theory simultaneously accounts for confinement, rotation, viscosity and magnetic fields. We consider a conduc…
Semi-convection in rotating spherical shells: flows, layers and dynamos
Paul Pružina, Nathanaël Schaeffer, David Cébron
Large regions of giant planets are thought to possess unstable thermal gradients stabilised by gradients in heavy-element composition. The fluid can then develop semi-convection, a…
Did lunar tides sustain the early Earth's dynamo?
Jérémie Vidal, David Cébron
Geological data show that, early in its history, the Earth had a large-scale magnetic field with an amplitude comparable to the one of the present geomagnetic field. However, its o…
Planetary dynamos driven by semiconvection in stably stratified layers
Paul Pružina, David Cébron, Nathanaël Schaeffer
Stably stratified fluid layers are common in gaseous planets, stellar interiors, and planetary cores, and have long been considered incapable of sustaining dynamo action. Here, we…
Geophysical flows over topography, a playground for laboratory experiments
Jérémie Vidal, Jérôme Noir, David Cébron +4
Physicists face major challenges in modelling multi-scale phenomena that are observed in geophysical flows (e.g. in the Earth's oceans and atmosphere, or liquid planetary cores). I…
Precession-driven flows in non-axisymmetric ellipsoids
Jerome Noir, David Cébron
We study the flow forced by precession in rigid non-axisymmetric ellipsoidal containers. To do so, we revisit the inviscid and viscous analytical models that have been previously d…
Magnetohydrodynamic simulations of the elliptical instability in triaxial ellipsoids
David Cébron, Michael Le Bars, Pierre Maubert +1
The elliptical instability can take place in planetary cores and stars elliptically deformed by gravitational effects, where it generates large-scale three-dimensional flows assume…
Wake effects characterization using wake oscillator model. Comparison on 2D response with experiments
Benoît Gaurier, Grégory Germain, David Cébron
A model using wake oscillators is developed to predict the 2D motion in a transverse plan of two rigid cylinders in tandem arrangement. This model of the wake dynamics is validated…