回転矩形管内を発達して流れる気泡流の相分布に及ぼす乱流モデルの影響

概要

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A fully three-dimensional numerical procedure based on the two-fluid model is proposed for the prediction of developing turbulent two-phase bubbly flow in a rotating squre-sectioned duct. The effects of turbulence models on phase distributions are investigated by utilizing the standard k-ε model and Speziale's nonlinear k-ε model with or without additional source terms relating to Coriolis modification or phase-fraction fluctuations. By comparing with existing experimental results, it is found that the additional source terms related to phase-fraction fluctuations tend to underestimate the lateral phase distribution and that Reynolds stress anisotropy has more or less effect on the phase distribution but inconsiderable effect on the pressure, axial and secondary flow velocities.
社団法人日本機械学会の論文
1998-05-25