Stability of exothermic autocatalytic fronts with regard to buoyancy-driven instabilities in presence of heat losses |
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Authors: | T GérardA De Wit |
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Institution: | Nonlinear Physical Chemistry Unit and Centre for Nonlinear Phenomena and Complex Systems, CP 231, Faculté des Sciences, Campus Plaine, Université Libre de Bruxelles (ULB), 1050 Brussels, Belgium |
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Abstract: | Across traveling autocatalytic fronts, density differences due to composition and temperature changes can lead to buoyancy-driven hydrodynamic instabilities deforming the front by convective motions. We study here the influence of heat losses through the walls of the reactor on the stability of such exothermic fronts in the gravity field. The stability domain is computed numerically in a parameter space spanned by the solutal Rc and thermal RT Rayleigh numbers of the problem for various values of the Newton's coefficient α quantifying the intensity of heat losses. |
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Keywords: | Heat losses Autocatalytic front Rayleigh-Taylor Convection Exothermic front Fingering |
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