Turbulent compressible convection in a deep atmosphere. IV - Results of three-dimensional computations

Statistics – Computation

Scientific paper

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Compressible Flow, Computational Astrophysics, Convection Currents, Magnetohydrodynamic Turbulence, Stellar Atmospheres, Flow Velocity, Navier-Stokes Equation, Spatial Distribution, Stellar Models, Three Dimensional Flow

Scientific paper

The behavior of turbulent convection in deep atmospheres is studied by numerically solving the three-dimensional Navier Stokes equations. It is found that the mean vertical velocity is an important link between the buoyancy work and the heat flux. In regions with efficient convection, the total flux is composed of the enthalpy flux and the flux of kinetic energy. The characteristics of these components of the total flux are examined. It is shown that the production of kinetic energy depends on the local variables and the flux. However, the dissipation of kinetic energy is nonlocal. A substantial amount of kinetic energy is carried away from the location of production to be dissipated in lower regions.

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