Turbulent compressible convection in a deep atmosphere. II - Two-dimensional results for main-sequence A5 and F0 type envelopes

Details Turbulent compressible convection in a deep atmosphere. II - Two-dimensional results for main-sequence A5 and F0 type envelopes Turbulent compressible convection in a deep atmosphere. II - Two-dimensional results for main-sequence A5 and F0 type envelopes

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..550s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 550-556.

Astronomy and Astrophysics

Astrophysics

46

Convective Flow, Main Sequence Stars, Stellar Atmospheres, Stellar Envelopes, Stellar Models, Compressible Flow, Gas Ionization, Navier-Stokes Equation, Radiative Transfer, Turbulent Flow, Velocity Distribution

Scientific paper

In the present two-dimensional numerical study of turbulent compressible convection in the A5 and F0 main-sequence envelope types, ionization effects are included in the equation of state of the gas, and radiative transfer is modeled in a diffusive process with tabulated gas opacities. It is noted that the thermal effects of ionization significantly affect the dynamics of the flows and that an inversion of the mean density can be created and sustained in a dynamical situation. The substantial differences in the flows of A5 and F0 indicate development trends in the transition from the radiative to the convective mode of energy transport. As convection becomes more effective, the flow becomes more turbulent and the scaling effects of local scale heights become more significant.

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