FRONT-TRACKING法による界面上の不純物輸送を考慮した液滴流動の数値シミュレーション(流体工学,流体機械)

概要

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In this paper, a front-tracking (FT) method combined with a solver of interfacial transport of surfactant was proposed in order to resolve interfacial flows affected by contamination. In the FT method, because the interfaces are presented explicitly, advection-diffusion equation on the interface can be easily treated and can be solved highly accurately. In this study, a scheme which conserves the total mass completely was constructed and proposed. Numerical simulations of a water drop sinking in silicone oil were performed taking the Marangoni effect into account. The effects of three parameters, damping coefficient of interfacial tension, diffusion coefficient and total mass, were evaluated. Calculated results were compared with PTV measurements and were in very good agreement with them in the points of stagnant cap size, flow separation point, peak of shear stress and so on. So, we can expect that our simulations can estimate the conditions of surfactant on the interfaces, which is very difficult to be measured.
社団法人日本機械学会の論文
2006-08-25