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

Hendrik J. Viljoen | Zendy; Jorge E. Gatica | Zendy; Vladimír Hlaváček | Zendy

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

Author(s) -

Hendrik J. Viljoen,

Jorge E. Gatica,

Vladimír Hlaváček

Publication year - 1989

Publication title -

physics of fluids a fluid dynamics

Language(s) - English

Resource type - Journals

eISSN - 2163-5013

pISSN - 0899-8213

DOI - 10.1063/1.857443

Subject(s) - physics , convection , mechanics , marginal stability , stability (learning theory) , truncation (statistics) , fourier series , nonlinear system , galerkin method , instability , classical mechanics , fourier transform , mathematical analysis , statistics , mathematics , quantum mechanics , machine learning , computer science

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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