20510 発熱反応を伴う液体流場における振動現象(OS1 反応性流れの基礎と応用へ向けた展開)

概要

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The oscillatory phenomenon occurring in a liquid shear flow with a diffusive exothermic reaction has been reported. This phenomenon is sensitive to change of viscosity, therefore it occurs easily near the wall because of the large shear stress. Its quantitative model is needed to predict and control the oscillation in reactors with very small scale. However, the dynamic mechanism among various factors in the oscillatory pattern formations has not been fully understood. In this study, the relationship between oscillatory patterns and parameters i.e., pipe width, viscosity, flow rate, is experimentally investigated in narrow rectangular pipe and oscillatory flow patterns are visualized using dye. Fractal dimension analysis is introduced to investigate on the complexity of the oscillatory mechanism. Moreover, fractal dimension for time series data is used to discuss on the effect of viscosity on the thermal oscillation. Oscillatory patterns changing time and space are microscopically analyzed using fractal dimension.
社団法人日本機械学会の論文
2005-03-17