101 citations · 663 across the 18 of their papers we have counts for
12 papers · 1 filter
Convective Lengthscale in Planetary Cores
Céline Guervilly, Philippe Cardin, Nathanaël Schaeffer
Convection is a fundamental physical process in the fluid cores of planets because it is the primary transport mechanism for heat and chemical species and the primary energy source…
Subcritical thermal convection of liquid metals in a rapidly rotating sphere
E. J. Kaplan, N. Schaeffer, J. Vidal +1
Planetary cores consist of liquid metals (low Prandtl number ) that convect as the core cools. Here we study nonlinear convection in a rotating (low Ekman number ) planetar…
Magneto--Coriolis waves in a spherical Couette flow experiment
Denys Schmitt, Philippe Cardin, Patrick La Rizza +1
The dynamics of fluctuations in a fast rotating spherical Couette flow experiment in the presence of a strong dipolar magnetic field is investigated in detail, through a thorough a…
Earth's Inner Core dynamics induced by the Lorentz force
M. Lasbleis, R. Deguen, P. Cardin +1
Seismic studies indicate that the Earth's inner core has a complex structure and exhibits a strong elastic anisotropy with a cylindrical symmetry. Among the various models which ha…
Is inner core seismic anisotropy a marker of plastic flow of cubic iron?
A. Lincot, S. Merkel, Philippe Cardin
This paper investigates whether observations of seismic anisotropy are compatible with a cubic structure of the inner core Fe alloy. We assume that anisotropy is the result of plas…
Thermal convection in Earth's inner core with phase change at its boundary
Renaud Deguen, Thierry Alboussière, Philippe Cardin
Inner core translation, with solidification on one hemisphere and melting on the other, provides a promising basis for understanding the hemispherical dichotomy of the inner core,…
On the reflection of Alfvén waves and its implication for Earth's core modeling
Nathanaël Schaeffer, Dominique Jault, Philippe Cardin +1
Alfvén waves propagate in electrically conducting fluids in the presence of a magnetic field. Their reflection properties depend on the ratio between the kinematic viscosity and th…
A dynamo driven by zonal jets at the upper surface: Applications to giant planets
Céline Guervilly, Philippe Cardin, Nathanaël Schaeffer
We present a dynamo mechanism arising from the presence of barotropically unstable zonal jet currents in a rotating spherical shell. The shear instability of the zonal flow develop…
Zonal shear and super-rotation in a magnetized spherical Couette flow experiment
Daniel Brito, Thierry Alboussière, Philippe Cardin +6
We present measurements performed in a spherical shell filled with liquid sodium, where a 74 mm-radius inner sphere is rotated while a 210 mm-radius outer sphere is at rest. The in…
Rapidly rotating spherical Couette flow in a dipolar magnetic field: an experimental study of the mean axisymmetric flow
Henri-Claude Nataf, Thierry Alboussiere, Daniel Brito +4
In order to explore the magnetostrophic regime expected for planetary cores, experiments have been conducted in a rotating sphere filled with liquid sodium, with an imposed dipolar…
Experimental study of super-rotation in a magnetostrophic spherical Couette flow
Henri-Claude Nataf, Thierry Alboussière, Daniel Brito +5
We report measurements of electric potentials at the surface of a spherical container of liquid sodium in which a magnetized inner core is differentially rotating. The azimuthal an…
Visco-magnetic torque at the core mantle boundary
Bérangère Deleplace, Philippe Cardin
A magneto-hydrodynamic model of boundary layers at the Core-Mantle Boundary (CMB) is derived and used to compute the viscous and electromagnetic torques generated by the Earth's nu…