化学反応による粘度減少を伴うmiscible viscous fingeringに及ぼすダムケラー数の影響(燃焼反応流,一般講演)

概要

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When a reactive and miscible less-viscous liquid displaces a more-viscous liquid in a Hele-Shaw cell, reactive miscible viscous fingering takes place. We find that a chemical reaction between a polymer solution and a solution including metal ions decreases the viscosity of the polymer solution and that the rate of the decrease in the viscosity (that is the chemical reaction rate) can be changed by variation in the concentrations of the metal ions. We succeed in experimentally showing effect of Damkohler number on miscible viscous fingering pattern in a radial Hele-Shaw cell by using reaction. Up to threshold value of Da, the area occupied by the fingering pattern near the injection hole is increased with Da, whereas over the threshold value of Da, the area is decreased with Da. A physical model to explain this change in the fingering pattern caused by the chemical reaction is proposed.
日本流体力学会の論文
2007-08-06