Reynolds stresses and differential rotation in Boussinesq convection in a rotating spherical shell.
Abstract
We consider the problem of how numerical simulations of convection in a spherical shell can be used to estimate turbulent transport coefficients that may be used in mean field theory. For this purpose we analyse data from simulations of three dimensional Boussinesq convection. The rotational influence on convection is described in terms of the {LAMBDA}-effect and anisotropic eddy conductivity. When the resulting transport coefficients are used in a mean field model, the original rotation law is recovered approximately. We thus conclude that the flow can be described in terms of a {LAMBDA}-effect. Our results are also compared with analytical theories and observations.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1994
- Bibcode:
- 1994A&A...286..471R
- Keywords:
-
- Boussinesq Approximation;
- Convection;
- Hydrodynamics;
- Reynolds Stress;
- Stellar Rotation;
- Transport Properties;
- Turbulent Flow;
- Computerized Simulation;
- Turbulence;
- Turbulence Models;
- Astrophysics;
- HYDRODYNAMICS;
- CONVECTION;
- TURBULENCE;
- SUN: ROTATION;
- STARS: ROTATION