マルチスケール混相流体方程式に基づく微細気泡の合一・反発挙動に関する基礎的研究(流体工学,流体機械)

概要

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The mechanism of bubble coalescence and repulsion is difficult and unresolved. This problem is one of key issues of the numerical research on multiphase flows. In experimental studies, it is revealed that not only a concentration of electrolyte solved in water but also ino-pair specificity are important for bubble coalescence. In our previous study, we qualitatively evaluated the multi-scale multiphase flow equations by simple numerical simulation of 2-dimensional bubble behaviors. In our simulation, a liquid film was observed between two microbubbles. The results indicated the importance of the effect of the contamination at the interface for the bubble interaction. In the present study, the coalescence model is newly developed which is based on the conventional nucleation theory correlated with an electric conductivity due to a contamination in the liquid. A simple 3-dimensional microbubble interaction is simulated with the coalescence model. As a result, we realize the duration of contact before the coalescence of two microbubbles in this numerical simulation.
一般社団法人日本機械学会の論文
2009-09-25