Hydrodynamic instability of chemical waves

Desiderio A. Vasquez, Joseph W. Wilder, Boyd F. Edwards

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

46 Citas (Scopus)


We present a theory for the transition to convection for flat chemical wave fronts propagating upward. The theory is based on the hydrodynamic equations and the one-variable reaction-diffusion equation that describes the chemical front for the iodate-arsenous acid reaction. The reaction term involves the reaction rate constants and the chemical composition of the mixture. This allows the discussion of the effects of the different chemical variables on the transition to convection. We have studied perturbations of different wavelengths on an unbounded flat chemical front and found that for wavelengths larger than a critical wavelength (λ > λc) the perturbations grow in time, while for smaller wavelengths the perturbations diminish. The critical wavelength depends not only on the density difference between the unreacted and reacted fluids, but also on the speed and thickness of the chemical front.

Idioma originalInglés
Páginas (desde-hasta)2138-2143
Número de páginas6
PublicaciónJournal of Chemical Physics
EstadoPublicada - 1993
Publicado de forma externa


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