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

Hendrik J Viljoen; Jorge E. Gatica; Vladimir Hlavacek

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

Hendrik J Viljoen, Jorge E. Gatica, Vladimir Hlavacek

Research output: Other contribution

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 language	American English
State	Published - Feb 1 1989
Externally published	Yes

Keywords

CAVITIES; FLUIDS; CHEMICAL REACTIONS; CATALYTIC EFFECTS; ADIABATIC PROCESSES; CONVECTIVE INSTABILITIES; MATHEMATICAL MODELS; FOURIER ANALYSIS; STABILITY; ANALYTICAL SOLUTION; NUMERICAL DATA

Disciplines

Chemical Engineering

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@misc{37bdf5beec944710b701043048b7b77d,

title = "Convective Regimes in reactive Fluid media due to the interaction with Catalytic Surfaces",

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.",

keywords = "CAVITIES; FLUIDS; CHEMICAL REACTIONS; CATALYTIC EFFECTS; ADIABATIC PROCESSES; CONVECTIVE INSTABILITIES; MATHEMATICAL MODELS; FOURIER ANALYSIS; STABILITY; ANALYTICAL SOLUTION; NUMERICAL DATA",

author = "Viljoen, \{Hendrik J\} and Gatica, \{Jorge E.\} and Vladimir Hlavacek",

year = "1989",

month = feb,

day = "1",

language = "American English",

type = "Other",

}

TY - GEN

T1 - Convective Regimes in reactive Fluid media due to the interaction with Catalytic Surfaces

AU - Viljoen, Hendrik J

AU - Gatica, Jorge E.

AU - Hlavacek, Vladimir

PY - 1989/2/1

Y1 - 1989/2/1

N2 - 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.

AB - 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.

KW - CAVITIES; FLUIDS; CHEMICAL REACTIONS; CATALYTIC EFFECTS; ADIABATIC PROCESSES; CONVECTIVE INSTABILITIES; MATHEMATICAL MODELS; FOURIER ANALYSIS; STABILITY; ANALYTICAL SOLUTION; NUMERICAL DATA

UR - https://digitalcommons.unl.edu/chemengreaction/11

M3 - Other contribution

ER -

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

Abstract

Keywords

Disciplines

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