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Numerical investigation of slug characteristics in a horizontal air/water and air/oil pipe flow

机译:水平空气/水和空气/油管流动中弹团特性的数值研究

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In the present work, the transition from stratified flow to slug flow regime for air-water and air-oil two-phase flow was simulated and analysed numerically. The simulation was carried out by numerically solving a three dimensional (3D) implicit unsteady volume of fluid (VOF) model. Typical slug characteristics, such as slug length, slug translational velocity, and slug frequency were determined. The numerical results were validated by comparison with experimental results and a reasonable agreement with an error less than 8.7% was achieved. Moreover, the results from the proposed model were compared to the results obtained from three empirical correlations for the two-phase slug flow and it demonstrated a good agreement. The simulation results demonstrated that for the same boundary conditions, the characteristics in terms of slug initiation and slug growth were strongly affected by the fluid properties. The simulation results also show that for air-oil flow, the pressure drop, slug translational velocity, and slug frequency values were less than in air-water flow by 2.9%, 14.3%, and 7.9%, respectively.
机译:在目前的工作中,对空气-水和气-油两相流从分层流向团状流的过渡进行了模拟和数值分析。通过数值求解三维(3D)隐式非定常流体体积(VOF)模型进行了仿真。确定了典型的弹头特性,例如弹头长度,弹头平移速度和弹头频率。通过与实验结果进行比较,验证了数值结果,并获得了误差小于8.7%的合理协议。此外,将所提出的模型的结果与从两相弹团流的三个经验相关性获得的结果进行了比较,并显示出良好的一致性。仿真结果表明,在相同的边界条件下,流体特性对团块萌生和团块生长的特性影响很大。仿真结果还表明,对于空气-油流,压降,段塞平移速度和段塞频率值分别比在空气-水流中小2.9%,14.3%和7.9%。

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