Numerical experiments on the effects of horizontal turbulent diffusion on transport by meridional circulation
Abstract
A set of numerical experiments aimed at quantifying various aspects of the horizontal turbulence (HT) ansatz of Chaboyer and Zahn (1992) is presented. It is demonstrated that the transition to 1-D behavior for both particle and angular momentum transport occurs for horizontal Reynolds numbers RH not greater than about 1, while the effective inhibition of meridional-circulation-mediated particle transport occurs for RH not greater than about 0.01. Constraints on the HT hypothesis can also be inferred from the diffusion models for FmAm and HgMn stars.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1992
- Bibcode:
- 1992A&A...259..134C
- Keywords:
-
- Angular Momentum;
- Meridional Flow;
- Rotating Fluids;
- Stellar Rotation;
- Transport Properties;
- Turbulent Diffusion;
- Circulation Distribution;
- Horizontal Orientation;
- Particle Motion;
- Astrophysics