New Numerical Solutions of Threedimensional Compressible Hydrodynamic Convection
Abstract
Numerical solutions of threedimensional compressible hydrodynamics (including sound waves) in a stratified medium with open boundaries are presented. Convergent/divergent points play a controlling role in the flows, which are dominated by a single frequency related to the mean sound crossing time. Superposed on these rapid compressive flows, slower eddylike flows eventually create convective transport. The solutions contain small structures stacked on top of larger ones, with vertical scales equal to the local pressure scale heights, H_{p.} Although convective transport starts later in the evolution, vertical scales of H_{p} are apparently selected at much earlier times by nonlinear compressive effects.
 Publication:

The Astrophysical Journal
 Pub Date:
 May 1990
 DOI:
 10.1086/185716
 Bibcode:
 1990ApJ...354L..33H
 Keywords:

 Compressible Flow;
 Computational Fluid Dynamics;
 Convective Flow;
 Hydrodynamic Equations;
 Stellar Physics;
 Three Dimensional Flow;
 Convergence;
 Divergence;
 Eddy Currents;
 Flow Velocity;
 Numerical Flow Visualization;
 Sound Waves;
 Astrophysics;
 CONVECTION;
 HYDRODYNAMICS;
 NUMERICAL METHODS;
 STARS: INTERIORS