Sustaining Earth's magnetic dynamo

M Landeau, A Fournier, HC Nataf, D Cébron… - Nature Reviews Earth & …, 2022 - nature.com
Earth's magnetic field is generated by fluid motions in the outer core. This geodynamo has
operated for over 3.4 billion years. However, the mechanism that has sustained the …

Tidal dissipation in stars and giant planets

GI Ogilvie - Annual Review of Astronomy and Astrophysics, 2014 - annualreviews.org
Astrophysical fluid bodies that orbit close to one another induce tidal distortions and flows
that are subject to dissipative processes. The spin and orbital motions undergo a coupled …

Tidal dissipation in evolving low-mass and solar-type stars with predictions for planetary orbital decay

AJ Barker - Monthly Notices of the Royal Astronomical Society, 2020 - academic.oup.com
We study tidal dissipation in stars with masses in the range 0.1–1.6 M⊙ throughout their
evolution, including turbulent effective viscosity acting on equilibrium tides and inertial …

Quasi-periodic eruptions from mildly eccentric unstable mass transfer in galactic nuclei

W Lu, E Quataert - Monthly Notices of the Royal Astronomical …, 2023 - academic.oup.com
We propose that the recently observed quasi-periodic eruptions (QPEs) in galactic nuclei
are produced by unstable mass transfer due to Roche lobe overflow of a low-mass main …

Flows driven by libration, precession, and tides

M Le Bars, D Cébron, P Le Gal - Annual Review of Fluid …, 2015 - annualreviews.org
Because of gravitational interactions with their companions, the rotational dynamics of
planets and stars involve periodic perturbations of their shape, the direction of their …

Convective turbulent viscosity acting on equilibrium tidal flows: new frequency scaling of the effective viscosity

CD Duguid, AJ Barker, CA Jones - Monthly Notices of the Royal …, 2020 - academic.oup.com
Turbulent convection is thought to act as an effective viscosity (ν E) in damping tidal flows in
stars and giant planets. However, the efficiency of this mechanism has long been debated …

Tidal dissipation due to the elliptical instability and turbulent viscosity in convection zones in rotating giant planets and stars

NB de Vries, AJ Barker… - Monthly Notices of the …, 2023 - academic.oup.com
Tidal dissipation in star–planet systems can occur through various mechanisms, among
which is the elliptical instability. This acts on elliptically deformed equilibrium tidal flows in …

Non-linear evolution of tidally forced inertial waves in rotating fluid bodies

B Favier, AJ Barker, C Baruteau… - Monthly Notices of the …, 2014 - academic.oup.com
We perform one of the first studies into the non-linear evolution of tidally excited inertial
waves in a uniformly rotating fluid body, exploring a simplified model of the fluid envelope of …

Inertial wave turbulence driven by elliptical instability

T Le Reun, B Favier, AJ Barker, M Le Bars - Physical Review Letters, 2017 - APS
The combination of elliptical deformation of streamlines and vorticity can lead to the
destabilization of any rotating flow via the elliptical instability. Such a mechanism has been …

Tidal dissipation in giant planets

J Fuller, T Guillot, S Mathis, C Murray - Space Science Reviews, 2024 - Springer
Tidal interactions between moons and planets can have major effects on the orbits, spins,
and thermal evolution of the moons. In the Saturn system, tidal dissipation in the planet …