par Dalle Vedove, Walter W 
;Sanfeld, Albert
Référence Journal of colloid and interface science, 84, 2, page (328-336)
Publication Publié, 1981-12
;Sanfeld, Albert Référence Journal of colloid and interface science, 84, 2, page (328-336)
Publication Publié, 1981-12
Article révisé par les pairs
| Résumé : | The mechanochemical stability of a plane and reacting fluid-fluid interface is analyzed for any kind of surface reaction scheme involving two fluctuating species. The theory developed in part I (J. Colloid Interface Sci. 84, 318 (1981)) is used to study the aperiodic unstable regimes. Under nonequilibrium conditions, these regimes are (i) possible for a class of non-autocatalytic and noncross-catalytic surface kinetics, (ii) always obtained when the surface kinetic processes are aperiodically unstable without convective coupling, and (iii) never induced by the mechanism leading to intrinsic chemical periodic instabilities. However, aperiodic mechanochemical unstable regimes are possible in this last situation. The qualitative behavior of the solutions of the dispersion equation as well as the properties of the marginal nonoscillatory regimes are discussed. The time constant is a continuous and a finite function defined for a finite range of values of the wavenumber. At most, three distinct nonvanishing values of the wavenumber are obtained under the marginal nonoscillatory conditions. The present results suggest that the macroscopic mechanisms responsible for the Marangoni instability are qualitatively different provided the surface chemical reaction scheme does or does not involve auto- or cross-catalytic steps. © 1981. |
