Convection and Dynamo in the Earth's Fluid Core
Lead Research Organisation:
UNIVERSITY OF EXETER
Department Name: Engineering Computer Science and Maths
Abstract
Constructing numerical geodynamo models with sufficient geophysical realism on modern massively parallel computers is of both practical and scientific importance. Supported by a NERC grant (NER/O/S/2001/01262, running 01/10/2003 to 26/12/2007), we have taken a major step towards the development of a new generation, EBE (element-by-element) finite element geodynamo code that has two main significant advantages: it is particularly suitable for modern massively parallel computers achieving nearly linear scalability and it is highly flexible to be capable of incorporating geophysical realism such as non-spherical geometry and local variations. This application requests funding for one PDRA at Exeter to continue/extend our existing productive research on the asymptotic convection study and geodynamo modeling and to advance our understanding of the spatial and temporal structure of non-magnetic nonlinear convection in the Earth's liquid core and of how the convection-driven geodynamo operating in an electrically conducting fluid core and the pattern of magnetic flux emanating from the Earth's liquid core are affected by an electrically heterogeneous lower mantle.
Organisations
People |
ORCID iD |
Keke Zhang (Principal Investigator) |
Publications
Liao X
(2010)
A new Legendre-type polynomial and its application to geostrophic flow in rotating fluid spheres
in Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Zhang K
(2010)
On fluid flows in precessing spheres in the mantle frame of reference
in Physics of Fluids
Kong D
(2010)
Shapes of two-layer models of rotating planets
in Journal of Geophysical Research: Planets
Li L
(2010)
On nonlinear multiarmed spiral waves in slowly rotating fluid systems
in Physics of Fluids
Liao X
(2010)
Asymptotic and numerical solutions of the initial value problem in rotating planetary fluid cores
in Geophysical Journal International
ZHANG K
(2010)
On fluid flows in precessing narrow annular channels: asymptotic analysis and numerical simulation
in Journal of Fluid Mechanics
Schubert G
(2011)
Shapes and gravitational fields of rotating two-layer Maclaurin ellipsoids: Application to planets and satellites
in Physics of the Earth and Planetary Interiors
Jones C
(2011)
Anelastic convection-driven dynamo benchmarks
in Icarus
ZHANG K
(2011)
On fluid motion in librating ellipsoids with moderate equatorial eccentricity
in Journal of Fluid Mechanics
Zhan X
(2011)
A full-sphere convection-driven dynamo: Implications for the ancient geomagnetic field
in Physics of the Earth and Planetary Interiors
Description | We have discovered the possible resonance in planetary systems due to libration. A new asymptotic theory for the classical problem of thermal convection in rotating spheres is developed. |
Exploitation Route | The findings have motivated several lab/numerical experiments. |
Sectors | Aerospace, Defence and Marine,Other |
Description | My findings presented in my theory have been confirmed several lab experiments. |
First Year Of Impact | 2013 |
Sector | Aerospace, Defence and Marine,Other |
Impact Types | Cultural |