Chinks in Solar Dynamo Theory: Turbulent Diffusion, Dynamo Waves and Magnetic Helicity
Abstract
In this first year of our investigation we explored the role of compressibility and stratification in the dissipation of magnetic fields. The predictions of Mean Field Electrodynamics have been questioned because of the strong feedback of small scale magnetic structure on the velocity fields. In 2-D, this nonlinear feedback results in a lengthening of the turbulent decay time. In 3-D alpha-quenching is predicted. Previous studies assumed a homogeneous fluid. This first year we present recent results from 2-D compressible MHD decay simulations in a highly stratified atmosphere that more closely resembles to solar convection zone. We have applied for NCCS T3E time to assist in the performance of our 3-D calculations.
- Publication:
-
National Aeronautics and Space Administration Report
- Pub Date:
- May 1998
- Bibcode:
- 1998nasa.reptV....D
- Keywords:
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- Dynamo Theory;
- Magnetic Field Configurations;
- Electrodynamics;
- Magnetic Fields;
- Diffusion Waves;
- Cosmic Rays;
- Compressibility;
- Magnetohydrodynamics;
- Velocity Distribution;
- Stratification;
- Nonlinear Feedback;
- Solar Physics