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Direct and Inverse Cascades in the Geodynamo : Volume 15, Issue 6 (24/11/2008)

By Reshetnyak, M.

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Book Id: WPLBN0003980237
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Direct and Inverse Cascades in the Geodynamo : Volume 15, Issue 6 (24/11/2008)  
Author: Reshetnyak, M.
Volume: Vol. 15, Issue 6
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2008
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Hejda, P., & Reshetnyak, M. (2008). Direct and Inverse Cascades in the Geodynamo : Volume 15, Issue 6 (24/11/2008). Retrieved from http://hawaiilibrary.net/


Description
Description: Institute of the Physics of the Earth, Russian Acad. Sci, 123995 Moscow, Russia. The rapid rotation of planets causes cyclonic thermal turbulence in their cores which may generate the large-scale magnetic fields observed outside the planets. We investigate numerically a model based on the geodynamo equations in simplified geometry, which enables us to reproduce the main features of small-scale geostrophic flows in physical and wave vector spaces. We find fluxes of kinetic and magnetic energy as a function of the wave number and demonstrate the co-existence of forward and inverse cascades. We also explain the mechanism of magnetic field saturation at the end of the kinematic dynamo regime.

Summary
Direct and inverse cascades in the geodynamo

Excerpt
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