Effect of superficial gas velocity on Air-Water two-phase flow in a micro-channel
Résumé
A numerical approach is followed in this study to investigate effect of inlet parameters on two phase flow patterns in a horizontal tube of a millimeter size or lower. The numerical simulations are conducted using air and water as the working fluids. The model is based on a computational fluid dynamics (CFD) approach and is constructed with an open-source toolbox OpenFOAM, which utilizes a finite volume method to solve the Navier-Stokes equations along the volume of fluid (VOF) methodology to capture the liquid-gas interface. The numerical predictions obtained with this model are validated by experimental results of Zeguai et al. [1]. The flow patterns that are numerically visualized are bubbly, slug and annular flow. The effect of inlet phase velocities is analyzed. The inlet superficial gas velocity on the pressure gradient along the channel is analyzed. Transition from one flow pattern to another are localized and results are documented.
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