Pattern analysis of viscous oscillation in a shear flow induced by an exothermic reaction

Satoko Fujioka, Hideyuki Matsumoto, Chiaki Kuroda

研究成果: Article

抄録

An investigation is made of oscillatory phenomenon induced by an exothermic reaction. This oscillatory phenomenon occurs in a very thin mixing layer between two miscible and reacting fluids. A qualitative model based on the interaction among reaction, molecular momentum transfer, molecular heat transfer, molecular mass transfer and forced convective transfer was proposed by Kuroda and Ogawa [1994. Nonlinear waves in a shear flow with a diffusive exothermic reaction and its qualitative reasoning. Chem. Eng. Sci. 49(16), 2699-2708]. It is experimentally shown in the present study that the oscillatory patterns change in the flow direction. In the upstream area where oscillatory patterns are nearly straight stripes, effects of viscosity on those stripes are investigated. In the downstream area where stripes are wavy and disordered, fractal analysis is introduced to investigate the relationship between the transition of oscillatory flow patterns and process factors, i.e. the viscosity ratio, the entire viscosity, flow rate and the flow rate ratio. Fractal analysis is also applied to temperature oscillation, and it is confirmed that the characteristic patterns of oscillation become obscure as the entire viscosity increases. The entire viscosity is an important factor for controlling both oscillatory patterns of flow and temperature in this reactive flow system.

元の言語English
ページ(範囲)163-174
ページ数12
ジャーナルFluid Dynamics Research
40
発行部数3
DOI
出版物ステータスPublished - 2008 3
外部発表Yes

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Exothermic reactions
exothermic reactions
Shear flow
shear flow
Viscosity
viscosity
oscillations
Fractals
fractals
flow velocity
Flow rate
Momentum transfer
Molecular mass
Flow patterns
upstream
mass transfer
momentum transfer
flow distribution
Mass transfer
heat transfer

ASJC Scopus subject areas

  • Mechanical Engineering
  • Statistical and Nonlinear Physics

これを引用

Pattern analysis of viscous oscillation in a shear flow induced by an exothermic reaction. / Fujioka, Satoko; Matsumoto, Hideyuki; Kuroda, Chiaki.

:: Fluid Dynamics Research, 巻 40, 番号 3, 03.2008, p. 163-174.

研究成果: Article

Fujioka, Satoko ; Matsumoto, Hideyuki ; Kuroda, Chiaki. / Pattern analysis of viscous oscillation in a shear flow induced by an exothermic reaction. :: Fluid Dynamics Research. 2008 ; 巻 40, 番号 3. pp. 163-174.
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KW - Shear flow

KW - Viscous oscillation

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