The grid-spectral approach to 3-D geodynamo modelling

A 3-D kinematic geodynamo model in a sphere is considered. In contrast to the traditional spectral approach to the problem, a new grid-spectral method is proposed. The 3-D magnetic field and velocity field are resolved in the physical space for r- and θ-coordinates, whereas the sin- and cos-decompos...

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Bibliographic Details
Published inComputers & geosciences Vol. 26; no. 2; pp. 167 - 175
Main Authors Hejda, P., Reshetnyak, M.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.03.2000
Subjects
Asymmetric kinematic dynamo
Finite differences
Free decay modes
Asymmetric kinematic dynamo
Finite differences
Free decay modes
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Summary:A 3-D kinematic geodynamo model in a sphere is considered. In contrast to the traditional spectral approach to the problem, a new grid-spectral method is proposed. The 3-D magnetic field and velocity field are resolved in the physical space for r- and θ-coordinates, whereas the sin- and cos-decomposition is applied to the ϕ-coordinate. The computer code was tested by free-decay solutions, as well as by comparison with the results reported by other authors. This work is the first step of a project to study 3-D inviscid geodynamo models.
ISSN:0098-3004
1873-7803
DOI:10.1016/S0098-3004(99)00077-1