マルチスケール混相流体方程式に基づく気泡間相互作用の2次元検証解析(流体工学,流体機械)

概要

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A modeling of gas-liquid interface is one of key issues of the numerical research on multiphase flows. Especially, a mechanism of bubble coalescence/repulsion is unresolved and there are no valid numerical models. The phenomenon may be related to thermodynamics, electromagnetics, hydrodynamics, and heat and mass transfer. In the experimental studies, it is revealed that a concentration of electrolyte solved in water and ion-pair specificity affect the bubble coalescence. Therefore, it is necessary to take such effects on bubble coalescence into consideration in a gas-liquid interfacial model. In the previous our study, having assumed that the interface has a finite thickness, we have developed a new gas-liquid interfacial model based on thermodynamic and mathematical approach. In that study, we have derived a new governing equation with free energy including the effect of the electric double layer caused by a contamination at the interface. In this paper, we applied the new interfacial model to 2-dimensional numerical simulation. Finally, we evaluated the new governing equation qualitatively by simulating a behavior of a single square microbubble and an interaction between two microbubbles including the electrical force.
一般社団法人日本機械学会の論文
2009-01-25