par Platten, Jean Karl;Legros, Jean Claude 
Référence Journal of non-equilibrium thermodynamics, 5, 4, page (243-254)
Publication Publié, 1980
Référence Journal of non-equilibrium thermodynamics, 5, 4, page (243-254)
Publication Publié, 1980
Article révisé par les pairs
| Résumé : | We have numerically studied the critical slowing down of perturbations in the case of the Benard convection, for Rayleigh numbers in the vicinity of its critical value. Our results are favorously compared with the theoretical predictions of the Landau model. Two types of boundary limits have been studied: the free boundary conditions which permit the use of a double Fourier expansion and the rigid boundary case for which a finite differences method had to be used. At a larger distance from the critical Rayleigh number, damped oscillatory transients have been studied. We have determined their level of appearance according to their Prandtl number. The period and the damping of the oscillations have been discussed as function of the distance from the critical point. © Copyright by Walter de Gruyter & Co. |
