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
Chan K
(2011)
Simulations of fluid motion in spheroidal planetary cores driven by latitudinal libration
in Physics of the Earth and Planetary Interiors
Chan K
(2011)
Simulations of fluid motion in ellipsoidal planetary cores driven by longitudinal libration
in Physics of the Earth and Planetary Interiors
Zhang K
(2012)
Asymptotic theory of resonant flow in a spheroidal cavity driven by latitudinal libration
in Journal of Fluid Mechanics
Zhan X
(2012)
Anelastic convection-driven dynamo benchmarks: A finite element model
in Icarus
Kong D
(2012)
ON THE VARIATION OF ZONAL GRAVITY COEFFICIENTS OF A GIANT PLANET CAUSED BY ITS DEEP ZONAL FLOWS
in The Astrophysical Journal
Liao X
(2012)
On flow in weakly precessing cylinders: the general asymptotic solution
in Journal of Fluid Mechanics
Kong D
(2013)
A THREE-DIMENSIONAL NUMERICAL SOLUTION FOR THE SHAPE OF A ROTATIONALLY DISTORTED POLYTROPE OF INDEX UNITY
in The Astrophysical Journal
Zhang K
(2013)
The non-resonant response of fluid in a rapidly rotating sphere undergoing longitudinal libration
in Journal of Fluid Mechanics
Kong D
(2013)
Gravitational signature of rotationally distorted Jupiter caused by deep zonal winds
in Icarus
Kong D
(2013)
ON THE GRAVITATIONAL FIELDS OF MACLAURIN SPHEROID MODELS OF ROTATING FLUID PLANETS
in The Astrophysical Journal
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 |