Abstract
In this paper we show that the adjoint formulation of the Stretch-Fold-Shear (SFS) fast dynamo model has smooth eigenfunctions at zero diffusivity. We thus compute fast dynamo action with smooth fields. We note that the adjoint problem is equivalent to use of a vector potential in reversed flow. We compare this behavior with analogous results for general pulsed-flow models. Some calculations using pulsed Beltrami waves are described.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 23-43 |
| Number of pages | 21 |
| Journal | Geophysical and Astrophysical Fluid Dynamics |
| Volume | 49 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 1989 |
| Externally published | Yes |
Keywords
- Beltrami flows
- Fast dynamos
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics
- Computational Mechanics
- Astronomy and Astrophysics
- Mechanics of Materials
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Cite this
Bayly, B. J., & Childress, S. (1989). Unsteady dynamo effects at large magnetic reynolds number. Geophysical and Astrophysical Fluid Dynamics, 49(1-4), 23-43. https://doi.org/10.1080/03091928908243461