Chemical and Biomolecular Engineering Research and Publications



Convective Regimes in reactive Fluid media due to the interaction with Catalytic Surfaces

Date of this Version

February 1989


This article was published in Physics of Fluids A: Fluid Dynamics -- February 1989 -- Volume 1, Issue 2, pp. 274-284. doi:10.1063/1.857443 Copyright 1989. American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Fluids A: Fluid Dynamics -- February 1989 -- Volume 1, Issue 2, pp. 274-284.and may be found at Physics of Fluids A:


Reactive fluid media enclosed in a cavity with a catalytic surface are analyzed. Nonisothermal chemical reactions on this surface can lead to convective instabilities. A simplified model is developed by using a low-order truncation of a Fourier-type expansion and employing the Galerkin method. A linear stability analysis is presented and it is shown that, under certain conditions, the marginal curve for the onset of oscillatory instabilities can lie below that for monotonic ones. The stability of the convective modes is studied by nonlinear stability analysis and it is shown how they can evolve into periodic and nonperiodic motion patterns. Numerical results are provided to support and confirm analytical predictions.

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