Planetary magnetic fields and fluid dynamos
CA Jones - Annual Review of Fluid Mechanics, 2011 - annualreviews.org
The magnetic fields of the planets, including the Earth, are generated by dynamo action in
their fluid cores. Numerical models of this process have been developed that solve the …
their fluid cores. Numerical models of this process have been developed that solve the …
Short timescale core dynamics: theory and observations
Fluid motions in the Earth's core produce changes in the geomagnetic field (secular
variation) and are also an important ingredient in the planet's rotational dynamics. In this …
variation) and are also an important ingredient in the planet's rotational dynamics. In this …
Spherical convective dynamos in the rapidly rotating asymptotic regime
Self-sustained convective dynamos in planetary systems operate in an asymptotic regime of
rapid rotation, where a balance is thought to hold between the Coriolis, pressure, buoyancy …
rapid rotation, where a balance is thought to hold between the Coriolis, pressure, buoyancy …
Bottom-up control of geomagnetic secular variation by the Earth's inner core
Temporal changes in the Earth's magnetic field, known as geomagnetic secular variation,
occur most prominently at low latitudes in the Atlantic hemisphere,(that is, from− 90 degrees …
occur most prominently at low latitudes in the Atlantic hemisphere,(that is, from− 90 degrees …
Turbulent convective length scale in planetary cores
Convection is a fundamental physical process in the fluid cores of planets. It is the primary
transport mechanism for heat and chemical species and the primary energy source for …
transport mechanism for heat and chemical species and the primary energy source for …
Seismic low-velocity equatorial torus in the Earth's outer core: Evidence from the late–coda correlation wavefield
X Ma, H Tkalčić - Science Advances, 2024 - science.org
Thermochemical inhomogeneities in the Earth's outer core that enhance our understanding
of the geodynamo have been elusive. Seismic constraints on such inhomogeneities would …
of the geodynamo have been elusive. Seismic constraints on such inhomogeneities would …
From zonal flow to convection rolls in Rayleigh–Bénard convection with free-slip plates
Q Wang, KL Chong, RJAM Stevens… - Journal of Fluid …, 2020 - cambridge.org
Rayleigh–Bénard (RB) convection with free-slip plates and horizontally periodic boundary
conditions is investigated using direct numerical simulations. Two configurations are …
conditions is investigated using direct numerical simulations. Two configurations are …
Laboratory-numerical models of rapidly rotating convection in planetary cores
JS Cheng, S Stellmach, A Ribeiro… - Geophysical Journal …, 2015 - academic.oup.com
We present laboratory and numerical models investigating the behavioural regimes of
rapidly rotating convection in high-latitude planetary core-style settings. Our combined …
rapidly rotating convection in high-latitude planetary core-style settings. Our combined …
Approaching a realistic force balance in geodynamo simulations
Earth sustains its magnetic field by a dynamo process driven by convection in the liquid
outer core. Geodynamo simulations have been successful in reproducing many observed …
outer core. Geodynamo simulations have been successful in reproducing many observed …
Laminar superlayer at the turbulence boundary
M Holzner, B Lüthi - Physical review letters, 2011 - APS
In this Letter we present results from particle tracking velocimetry and direct numerical
simulation that are congruent with the existence of a laminar superlayer, as proposed in the …
simulation that are congruent with the existence of a laminar superlayer, as proposed in the …