Convective regimes in reactive fluid media due to the interaction with catalytic surfaces

Hendrik J. Viljoen, Jorge E. Gatica, Vladimir Hlavacek

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)274-284
Number of pages11
JournalPhysics of Fluids A
Volume1
Issue number2
DOIs
StatePublished - 1989

ASJC Scopus subject areas

  • Engineering(all)

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