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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v34.i1-2.140
7 pages

Study of the Instability of Wave Packets in Fluidized-Bed Furnaces within the Framework of Ginzburg–Landau Equation

I. V. Elyukhina
South-Urals State University, Chelyabinsk, Russia
E. V. Toropov
South-Urals State University, Chelyabinsk, Russia
G. F. Kuznetsov
South-Urals State University, Chelyabinsk, Russia

ABSTRAKT

Using the many-scales method, the system of equations of the hydromechanics of a fluidized bed, which describes stationary homogeneous expansion of the bed, is reduced to the Ginzburg–Landau nonlinear parabolic equation. The analysis incorporates disturbances in the form of periodic waves and a spectrally narrow wave packet presented as a monochromatic wave. Within the framework of the equation obtained, the influence of the fluidized-bed parameters on the appearance of nonlinear instability is investigated. The conditions for the appearance of circulating zones are analyzed.


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