| Issue |
EAS Publications Series
Volume 38, 2009
Nonlinear Pulsations and Hydrodynamics of Cepheids
|
|
|---|---|---|
| Page(s) | 33 - 41 | |
| DOI | https://doi.org/10.1051/eas/0938004 | |
| Published online | 15 August 2009 | |
Nonlinear Pulsations and Hydrodynamics of Cepheids
M. Goupil, Z. Kolláth, N. Nardetto and P. Kervella (eds)
EAS Publications Series, 38 (2009) 33-41
M. Goupil, Z. Kolláth, N. Nardetto and P. Kervella (eds)
EAS Publications Series, 38 (2009) 33-41
Treatment of Convection in Time Dependent Computations of Stellar Pulsations
CRAL, Université de Lyon, CNRS (UMR 5574), École Normale Supérieure de Lyon, 69007 Lyon, France
We present a new numerical scheme describing the convective velocity field using two parallel radial columns in order to represent up- and downstream flows. The two columns are coupled by horizontal exchange via fluid flow and radiation over their common interface. For this geometrical setup, the equations of radiation hydrodynamics are solved time dependently using an implicit scheme which has the advantage of allowing very large time steps. Finally we demonstrate our approach for the example of a Cepheids convection zone.
© EAS, EDP Sciences, 2009