Nonlinear two-dimensional dynamics of stellar atmospheres. I - A computational code

Details Nonlinear two-dimensional dynamics of stellar atmospheres. I - A computational code Nonlinear two-dimensional dynamics of stellar atmospheres. I - A computational code

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134...77s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 1, May 1984, p. 77-86. Research supported by the Deutsche Forschungsg

Statistics

Computation

11

Computational Fluid Dynamics, Gravity Waves, Stellar Atmospheres, Stellar Models, Two Dimensional Flow, Acoustic Coupling, Atmospheric Models, Atmospheric Stratification, Brunt-Vaisala Frequency, Compressible Fluids, Finite Difference Theory, Hydrodynamic Equations, Method Of Characteristics, Nonlinear Equations

Scientific paper

The authors present a computational code that allows the nonlinear equations of motion for a compressible fluid to be solved. Earlier work on one-dimensional problems using the method of characteristics is generalised to two dimensions employing cylindrical geometry. The scheme is described in detail and its effectiveness is demonstrated using analytic examples of small-amplitude motion in an isothermal, stably stratified, atmosphere. The code is designed specifically to handle the problem of the overshoot and decay of convective motion in stellar atmospheres and their coupling to acoustic and internal wave fields.

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