### 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 |

巻 | 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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### ASJC Scopus subject areas

- Mechanical Engineering
- Statistical and Nonlinear Physics

### これを引用

*Fluid Dynamics Research*,

*40*(3), 163-174. https://doi.org/10.1016/j.fluiddyn.2007.06.002

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

研究成果: Article

*Fluid Dynamics Research*, 巻. 40, 番号 3, pp. 163-174. https://doi.org/10.1016/j.fluiddyn.2007.06.002

}

TY - JOUR

T1 - Pattern analysis of viscous oscillation in a shear flow induced by an exothermic reaction

AU - Fujioka, Satoko

AU - Matsumoto, Hideyuki

AU - Kuroda, Chiaki

PY - 2008/3

Y1 - 2008/3

N2 - 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.

AB - 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.

KW - Exothermic reaction

KW - Fractal analysis

KW - Pattern analysis

KW - Reacting flow

KW - Shear flow

KW - Viscous oscillation

UR - http://www.scopus.com/inward/record.url?scp=38649101892&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38649101892&partnerID=8YFLogxK

U2 - 10.1016/j.fluiddyn.2007.06.002

DO - 10.1016/j.fluiddyn.2007.06.002

M3 - Article

AN - SCOPUS:38649101892

VL - 40

SP - 163

EP - 174

JO - Fluid Dynamics Research

JF - Fluid Dynamics Research

SN - 0169-5983

IS - 3

ER -