安定化気泡関数有限要素法によるダブルY型マイクロチャネル内二相流における合流・分岐点の流況解析（界面位置の観察結果との比較に基づく再現計算）

概要

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In this study, fluid analysis at junction points for double Y type micro-channel two phase flow is carried out based on stabilized bubble function finite element method. This chip is widely applicable when we compound a medicine, or carry out environmental analysis, or make emulsions for cosmetics. In case that environmental analysis is carried out by using micro chemical chip, we have to completely devied two phase flow in micro channel. Hence, it is important to know the interface position based on numerical simulations before experiments and applications. In this study, incompressible Navier-Stokes equation with CFS model and continuity equation are employed to express flow fields, and advection equation is applied to compute the interface position. The finite element method is applied to compute these equations, and stabilized bubble function element is employed for discretization in space. In addition, fractional step method is applied to compute flow field. In this study, fluid analysis near Y junction for upstream and downstream sides are carried out. To confirm varidy of numerical results, those are compared with measurement results.